WEBVTT

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Anna: Hey there, space enthusiasts. Welcome to

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Astronomy Daily, your go to podcast for all

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the latest happenings in the cosmos and right

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here on Earth too. I'm your host, Anna, and

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I've got a really exciting episode lined up

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for you today. We're going to dive into some

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truly stunning new images of distant

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galaxies, talk about some groundbreaking new

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space missions that are just around the

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corner, and even get this, learn about a

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surprising animal adaptation right here on

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our own planet that involves, you know,

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stars. So buckle up because we're about to

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explore the universe one fascinating story at

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a time. Let's get started.

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Alright, let's kick things off with some

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absolutely breathtaking news from the cosmos.

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Astronomers have managed to capture what is

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truly an unprecedented and intricate image of

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the Sculptor Galaxy. This isn't just any

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picture, it's painted in thousands of

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colours, revealing all these amazing complex

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details of galactic systems. This

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incredible shot of the galaxy, which is also

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known as NGC 253 and is about 11

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million light years away. That's a pretty

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good distance, right? Was actually collected

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with the Multi Unit Spectroscopic Explorer,

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or MUSE instrument, located at

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the Very Large Telescope, the VLT in Chile.

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What's really cool is that beyond just giving

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us this galaxy wide view, the image shows

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these super intricate details of NGC

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253. It's hoped that this kind of detail

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can really help reveal the finer points of

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the poorly understood and often complex

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systems that galaxies actually are.

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As team leader Enrico Conju from the

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Universidad de Chile put it, the Sculptor

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Galaxy is in a sweet spot. He explained that

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it's close enough that we can resolve its

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internal structure and study its building

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blocks with incredible detail, but at the

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same time big enough that we can still see it

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as a whole system. To get this kind of

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detail, covering 65,000 light years of the

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90,000 light year wide galaxy required a

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lot of work. We're talking 100

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exposures collected over 50 hours of Muse

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observing time. But honestly, that effort

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was totally justified by the unprecedented

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detail we're seeing. Team member Katherine

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Krekel from Heidelberg University in Germany

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noted that they can zoom in to study

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individual regions where stars form at nearly

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the scale of individual stars. But we, we can

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also zoom out to study the galaxy as a whole.

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And speaking of discoveries, an initial look

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at this image has already yielded some

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amazing results. The team has been able to

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find 500 new planetary nebulae within the

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image. These are shells of gas and dust

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ejected from stars like our sun after they

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die and go into that puffed out red giant

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phase. This is pretty extraordinary

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because finding detections like this beyond

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the Milky Way and its immediate neighbours is

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really rare. Fabian Scheuerman, another

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Heidelberg University researcher, pointed out

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that beyond our galactic neighbourhood, we

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usually deal with fewer than 100 detections

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per galaxy. Now, despite the name, these

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planetary nebulae have absolutely nothing to

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do with planets, just to be clear. But they

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could be really fruitful in the future

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because astronomers can actually use them to

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make distance measurements. Adam Leroy,

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a researcher from Ohio State University and a

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team member, explained, finding the planetary

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nebulae allows us to verify the distance to

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the galaxy, a critical piece of information

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on which the rest of the studies of the

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galaxy depend. The team isn't done with

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this image of the Sculptor Galaxy just yet,

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by the way. The next step for these

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astronomers is to explore how hot gas flows

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through NGC 253, changing its

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composition and helping to create new stars.

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Enrico Konju wrapped up by saying

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how such small processes can have such a big

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impact on a galaxy whose entire size is

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thousands of times bigger is still a mystery.

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Their fascinating research was published just

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recently in the journal Astronomy and

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Astrophysics.

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Moving on to our own galactic backyard, we

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have some absolutely wild news about the

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supermassive black hole at the heart of our

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Milky Way. Sagittarius A, or CESKAR

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A for short. New analysis of

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data collected by the Event Horizon

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Telescope, or eht, reveals that

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this monster black hole is actually spinning

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almost as fast as physics allows. And get

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this, its rotational axis is pointed right in

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Earth's direction. These findings are pretty

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groundbreaking and honestly, they kind of

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challenge some existing theories about how

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black holes behave. It gives us these

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incredible new insights and into the centres

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of galaxies. So how did they figure this out?

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Well, astrophysicists

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developed and applied a brand new method to

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really tease out the secrets hidden in those

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supermassive black hole observations from the

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eht. You might remember the EHT

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collaboration from when they gave us the very

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first direct images of black hole shadows.

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First M, um, 87 star in a galaxy

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55 million light years away. And then of

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course, our own Sagittarius A.

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These images are truly incredible, but they

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are also super difficult to interpret. So

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to understand what they're looking at,

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scientists use simulations. They basically

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build a bunch of virtual characteristics and

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then figure out which ones look most like the

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actual observational data. This technique has

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been used a lot with EHT images, but now it's

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been taken up a notch. A team led by

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astronomer Michael Janssen used high

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throughput computing to develop millions of

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simulated black holes. Then they

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used all that data to train a neural network,

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which helped them extract as much information

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as possible from the EHT data and really

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identify the properties of these black holes.

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Their results show, among other things, that

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Sagittarius A isn't just spinning at close to

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its maximum speed, but also that the glow

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around it is generated by hot electrons.

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Perhaps the most intriguing part is that the

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magnetic field in the material swirling

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around Sagittarius A doesn't seem to be

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behaving in a way that's predicted by current

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theory. They also looked at M

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M87 and found that it's also

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rotating rapidly, though not quite as fast as

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Sagittarius A. But here's the Twist. With M

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M87, it's rotating in the

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opposite direction to the material swirling

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in a disc around it. Scientists think this

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could be because of a past merger with

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another supermassive black hole. As

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Janssen put it. That we are defying the

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prevailing theory is of course, exciting. He

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also added that he sees their AI and machine

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learning approach as just a first step, with

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more improvements and data expected,

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especially once the Africa millimetre

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telescope joins in. This incredible

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research was detailed in three papers

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published in Astronomy and Astrophysics.

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Speaking of groundbreaking research and

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pushing the boundaries of what we understand,

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let's look forward to a truly monumental

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event in astronomy. The astronomical

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community is eagerly awaiting another

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historic moment with the Vera C. Rubin

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Observatory. This incredible new generation

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telescope, named after the trailblazing

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astronomer Vera Rubin, who, if you

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remember from earlier, was instrumental in

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uncovering the existence of dark matter

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through her observations of galactic rotation

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and is poised to continue her revolutionary

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work. It's been under construction in Chile's

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Atacama Desert, and honestly, it's a

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technological marvel. The Rubin Observatory

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is set to conduct the most comprehensive

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survey of the night sky ever attempted.

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Imagine this. It's going to photograph the

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entire visible southern sky every few nights

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for a full 10 years. At its heart is the

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world's largest digital camera, packing an

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astounding 3.2 billion pixels.

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To give you a sense of scale, it features an

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8.4 metre primary mirror with a three

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mirror design, providing an exceptionally

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wide 3.5 degree field of view. That's like

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seven times the area of the full moon. Its

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LSST camera, the Legacy Survey of Space and

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Time camera, is made up of 189

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individual CCD sensors, weighs in at

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3200 kilogrammes and operates at

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a chilling minus 100 degrees Celsius to

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minimise electronic noise. Located

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high up at over 2,600 metres

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elevation on Chile's Caro Pachon.

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This observatory isn't just going to search

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for the subtle effects of dark matter. It's

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going to catalogue billions of stars and

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galaxies, track dangerous asteroids,

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and monitor the universe's constant changes

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in real time. When it finally begins

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operations, the Rubin Observatory is expected

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to generate more astronomical data in its

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first month than all previous telescopes

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combined have collected throughout history.

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That's a lot of data. It can even slew

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between targets in just five seconds and will

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operate using six optical filters, completing

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a full sky survey every three nights. With

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just 15 second exposures. Over its 10 year

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mission, it's estimated it will catalogue 20

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billion galaxies and 17 billion stars.

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It really is incredible to think about how

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far we've come in just over 400 years since

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Galileo first peered at the universe through

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his telescope. And now we're on the cusp of

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another incredible milestone. So mark your

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calendars for June 23, 2025

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at 15:00-clock UTC. That's when the

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Rubin Observatory will unveil its first

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spectacular images in what they're calling

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the first look event. This event will be

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live streamed via YouTube, allowing people

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worldwide to witness this exciting moment

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together. It represents more than just

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another technological achievement. It

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symbolises our relentless pursuit to

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understand the universe, carrying forward

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Vera Rubin's legacy of discovery into an age

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where the observatory that carries her name

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will give us a whole new view of the cosmos.

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Definitely check that out. When it drops.

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Okay. From massive new observatories, we're

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going to pivot a bit to something else that's

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really exciting in space exploration. Firefly

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Aerospace is getting ready for its next

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mission to the moon. And they're hoping to

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once again make history. But this time,

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even before they reach the lunar surface, the

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company recently unveiled something super

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cool called Ocula, which is a new lunar

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imaging service. They're aiming to become the

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very first company to offer this type of high

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resolution imaging capability in lunar orbit

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from a commercial provider. How awesome is

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that? Jason Kim, the CEO of Firefly

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Aerospace, said that this idea, you know,

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getting more imagery of the lunar surface,

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looking for minerals, understanding activity,

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or even doing space domain awareness has

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always been something they were exploring. He

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thinks Ocula will be super beneficial for

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NASA as well as for science, commercial and

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national security missions out there. And

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here's a fun fact for you. Like a lot of

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Firefly Aerospace's hardware and software,

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this new imaging service also pays homage to

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the movie Serenity, which is a sequel to the

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sci fi series Firefly Ocula

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is actually the name of one of the spaceships

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in the film, Kim said. It's just a great name

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for a game changing mission like this, and

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it's fitting for what they're doing. It's the

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first of its kind, the first commercial

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mission to do this imaging and mapping around

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the moon. Now, unlike their

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previous Blue Ghost Mission 1, which landed

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on the earth facing side of the moon, Blue

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Ghost Mission 2 is going to try a landing on

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the far side. But before it even attempts

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that landing, it will deploy the Elytra

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spacecraft with Ocula on board.

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Ocula's telescope is designed to capture

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incredible 0.2 metre

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resolution images of the moon's surface from

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an altitude of 50 kilometres. The goal

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is to eventually develop a whole

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constellation of these in lunar orbit, which

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would offer a high revisit rate to a bunch of

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different parties. Firefly is already seeing

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a lot of demand and interest in the data

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Ocula will gather. They're developing

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this Ocula technology in partnership with

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Lawrence Livermore National Laboratory in

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California, which is pretty cool. Beyond Blue

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Ghost Mission 2, which is targeting a launch

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in 2026, Firefly also

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plans to fly Ocula on the Elytra 3 vehicle,

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supporting a Department of Defence project no

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earlier than 2027. And get this,

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Kim even mentioned the possibility of

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deploying the Ocula technology for future

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Mars exploration missions too. That's

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like a huge leap, right? It just shows

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you how versatile and exciting this new

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capability could be.

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Okay, so speaking of exciting missions, we

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have another update with some good news

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regarding Axiom Space's AXE 4 private

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astronaut mission to the International Space

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Station. After a couple of unexpected delays,

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it looks like it's back on schedule for a

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launch this coming Sunday, June 22nd. This

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mission, AXE 4, is Axiom's fourth

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crewed flight to the ISS. It was actually

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supposed to launch back on June 11th, but

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then they found a liquid oxygen leak in the

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Falcon 9 booster, which pushed things back a

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day. And then, believe it or not, they found

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another leak, but this time it was at the ISS

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itself in the Zvezda Russian service module.

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Zvezda has been a bit leaky for a while,

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apparently, but this new pressure signature

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prompted an indefinite delay for Axe 4, just

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out of an abundance of caution, you know. But

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good news, it seems like the appropriate

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repairs have been made. NASA said that after

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the most recent fix, pressure in the transfer

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tunnel has been stable, which could mean

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those small leaks have been sealed. They're

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still evaluating it to be super sure, but

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it's looking positive and the fixes to the

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Falcon 9 booster are definitely complete.

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SpaceX even did a new fueling test, a wet

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dress rehearsal and the rocket is ready to

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go.

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Alright, from super cool space missions to

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something a little closer to home, but no

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less amazing. Let's talk about the incredible

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journey of the Bogong moth. Scientists

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have actually discovered that this Australian

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moth might be the first insect ever known

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to use stars for long distance navigation.

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Yeah, you heard that right, stars. Every

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spring, billions of these brown Bogong

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moths migrate around a thousand kilometres

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or, or about 620 miles north to

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the Australian Alps. They hide in cool caves

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there to avoid the heat. And then in the fall

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or autumn, as they say in Australia, they

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head back to their breeding grounds. The

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big question for a long time was how do they

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travel to a place they've never visited

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before? Well, researchers now believe the

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answer is stellar navigation. We already knew

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they could use Earth's magnetic field to

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navigate, but it seemed like they needed

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visual landmarks too. And what's a more

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obvious visual landmark at night than the

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Milky Way? To test this, the scientists

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captured some moths, put them in a

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planetarium like flight simulator, which

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sounds like something out of a sci fi movie,

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doesn't it? And blocked Earth's magnetic

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field, forcing the moths to rely on their

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eyesight. And guess what? The moths flew

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in the correct migratory direction based on

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the stars. Their brains were even most active

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when they were flying the right way in the

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simulation. It's truly wild.

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This is a pretty big deal because while some

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insects use stars for short distance

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movements, the Bogong moth is the first known

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to use them for these epic long distance

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journeys. Understanding how these little guys

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navigate is also super important for their

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conservation. Especially with light pollution

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becoming a bigger issue. Urban lights can

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really disorient them. There was even a time

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when a whole cloud of moths grew briefly took

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over the Australian Parliament. It just shows

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you how intricately life on Earth connects

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with the celestial sphere.

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And before I wrap up this episode, some late

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breaking news. SpaceX's newest Starship

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vehicle just went up in smoke. The company

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was testing a starship upper stage at its

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Starbase site in South Texas on Wednesday

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night to prepare for the mega rocket's

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upcoming 10th flight test. But something went

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very wrong. Dreadfully wrong. The

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vehicle exploded, sending a massive fireball

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high into the dark Texas skies. Video

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from sources such as

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NASASpaceflight.com showed the vehicle,

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designated Ship 36, exploded just after

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midnight Eastern while on a test stand at a

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site known as Massey's, several kilometres

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west from the company's launch pads at

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Starbase Texas, SpaceX said in a statement

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about 90 minutes after the incident. A safety

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clear area around the site was maintained

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throughout the operation and all personnel

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are safe and accounted for. The company added

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it was working to secure the test site in

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cooperation with local officials and that

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there were no hazards for people in the area.

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And with that news, we come to the end of

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another episode of Astronomy Daily. I mean,

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it's just amazing how much is happening out

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there, isn't it? From galaxies painted in a

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thousand colours to moths navigating by the

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stars, there's always something new and

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incredible to discover. Thank you so much for

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tuning in. I've been your host. Anna before

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you go, remember to visit our website at

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00:16:58.830 --> 00:17:01.190
astronomydaily IO. That's

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00:17:01.190 --> 00:17:04.110
astronomydaily IO. There you can sign up for

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00:17:04.110 --> 00:17:05.990
our free daily newsletter to stay up to date

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00:17:05.990 --> 00:17:08.070
on all the latest space news, and you can

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00:17:08.070 --> 00:17:10.750
also listen to all our back episodes. Don't

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00:17:10.750 --> 00:17:13.150
forget to subscribe to Astronomy Daily on

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00:17:16.150 --> 00:17:18.760
or, you know, wherever you get your podcasts.

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You never miss an episode. We'll be back

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00:17:20.750 --> 00:17:23.150
tomorrow with more cosmic wonders. Until

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00:17:23.150 --> 00:17:24.350
then, keep looking up.
