WEBVTT

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Anna: Welcome to Astronomy Daily, your source for

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the latest developments in space exploration

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and astronomical discoveries. I'm your host,

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Anna. And today we'll be exploring Elon

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Musk's ambitious timeline for reaching the

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Red Planet. A, groundbreaking discovery about

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Mars's atmosphere that's been a decade in the

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making and unprecedented views of our sun's

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outer atmosphere that are revolutionising

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solar science. Then we'll journey to

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Jupiter's icy moon Europa, where recent

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observations reveal a surprisingly dynamic

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surface, before examining a mysteriously

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perfect sphere discovered deep within our

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Milky Way galaxy. So settle in as we

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embark on this cosmic journey through the

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latest and most fascinating developments in

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our quest to understand the universe around

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us.

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Let's start with Elon's latest plan.

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SpaceX CEO Elon Musk has revealed

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ambitious plans to send an uncrewed starship

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to Mars by the end of 2026.

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This timeline would coincide with a crucial

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astronomical window that occurs only once

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every two years, when Earth and Mars align

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in their orbits around the sun to create the

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most efficient path between the two planets.

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This alignment would minimise both travel

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time and fuel consumption, with the journey

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to Mars expected to take between seven and

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nine months. Despite the optimistic

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timeline, Musk himself acknowledges the

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challenges, giving the mission only a

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5050 chance of meeting this deadline. If

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Starship isn't ready by then, SpaceX would

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need to wait another two years for the next

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optimal launch window. What makes this

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proposed mission particularly fascinating is

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the planned cargo rather than traditional

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scientific equipment. Musk intends to send

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one or more Tesla built humanoid Optimus

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robots as a simulated crew. These

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robots would serve as stand ins for human

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astronauts, potentially testing various

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systems and protocols that would eventually

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be used by actual people. According to

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Musk's vision, human crews would follow on

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the second or third Mars landings. His long

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term ambition is staggeringly bold,

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eventually launching between 1,000 to 2,000

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ships to Mars every two years to rapidly

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establish a self sustaining permanent human

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settlement on the Red Planet. This timeline

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represents a significant shift from NASA's

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more conservative approach, which aims to

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return humans to the moon first using

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starship as the landing vehicle before

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attempting Mars missions sometime in the 2000

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and 30s. Musk has long advocated for a

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more Mars focused human spaceflight

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programme, previously targeting 2024 for

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a first crewed mission to the Red Planet.

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It's worth noting that Musk has a history of

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setting ambitious timelines that later get

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revised. He had previously mentioned sending

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an unmanned SpaceX vehicle to Mars as early

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as 2018, a goal that wasn't realised.

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The recent setback with Starship's ninth test

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flight, which ended with the vehicle spinning

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out of control and disintegrating, highlights

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the significant technical challenges that

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remain before any Mars mission becomes

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reality. Nevertheless, Musk appeared

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undeterred by the failure, describing it as

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providing good data to review and promising a

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faster launch cadence for upcoming test

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flights. As SpaceX continues to

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refine its massive starship vehicle, the race

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to put humans on Mars intensifies, with

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significant implications for the future of

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space exploration and potentially human

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civilization itself.

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While we're talking about Mars in a

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breakthrough discovery, NASA's MAVEN mission

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has finally observed a long theorised

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atmospheric escape process at Mars. After a

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decade of searching, scientists have directly

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detected a phenomenon called atmospheric

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sputtering, which works similar to a

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cannonball splash in a swimming pool, but on

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a planetary scale. When energetic

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charged particles from the sun crash into

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Mars's atmosphere, they essentially knock

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atoms out into space, gradually eroding the

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planet's atmosphere over billions of years.

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Dr. Shannon Curry, Maven's principal

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investigator at the Laboratory for

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Atmospheric and Space Physics, explains that

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previous evidence of sputtering was like

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finding ashes from a campfire. Scientists

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knew it happened, but had never directly

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observed the process until now. This

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discovery is crucial to understanding Mars's

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dramatic climate evolution. Billions of years

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ago, Mars had a thick atmosphere and liquid

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water flowing on its surface. However, when

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the planet lost its protective magnetic field

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early in its history, the atmosphere became

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directly exposed to the solar wind and solar

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storms, making it vulnerable to processes

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like sputtering. To make this observation,

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Maven scientists needed precise, simultaneous

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measurements from three different instruments

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aboard the spacecraft, capturing data from

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both the dayside and night side of Mars at

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low altitudes, a process that took years to

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achieve. The result was a new kind of map

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showing sputtered argon in relation to the

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solar wind, revealing argon at high altitudes

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exactly where energetic particles had

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collided with the atmosphere. Perhaps most

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surprising, researchers discovered that this

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atmospheric erosion is happening at a rate

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four times higher than previously predicted,

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and the rate increases even further during

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solar storms. This confirms that

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sputtering was likely a primary driver of

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atmospheric loss in Mars's early history,

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when the Sun's activity was much more

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intense. M the findings, published in

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Science Advances, provide critical insights

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into the conditions that once allowed liquid

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water to exist on Mars surface and the

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implications for potential ancient

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habitability. By understanding how Mars

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lost its atmosphere, scientists gain valuable

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knowledge about planetary evolution and the

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fragility of conditions needed to support

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life as we know it.

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Next up Today, the Sun's outer atmosphere,

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known as the corona, has long been a source

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of fascination and frustration for

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scientists. Its extreme temperatures, violent

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eruptions and towering prominences have been

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difficult to study in detail until now.

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Thanks to a revolutionary adaptive optic

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system called Kona, installed at the 1.6

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metre good solar telescope at Big Bear Solar

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Observatory in California, we now have

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unprecedented views of the Sun's most elusive

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layer. These new observations provide the

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sharpest images ever captured of the corona,

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revealing details that have never been seen

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before. One of the most striking discoveries

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is an incredibly detailed view of coronal

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rain. Delicate threads of cooling plasma

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cascading back down to the solar surface.

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Some of these plasma threads are

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astonishingly narrow, less than 12 miles

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across. Unlike rain on Earth, this solar

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precipitation doesn't fall straight down, but

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follows the Sun's magnetic field lines,

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creating beautiful arching and looping

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patterns as it returns to the surface.

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Perhaps even more exciting is the first ever

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observation of what scientists are calling a

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plasmoid, A finely structured plasma stream

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that forms and collapses rapidly. This snake

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like feature moves at speeds approaching 62

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miles per second across the solar surface.

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Dr. Vasil Yerkishin, who co authored the

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study, notes that these features have never

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been observed before and scientists aren't

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entirely sure what they are. The new

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imaging technology has also captured stunning

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views of solar prominences, those massive

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loops of plasma that extend from the sun's

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surface far into the corona. These

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detailed observations show these structures

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dancing and twisting in response to the Sun's

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magnetic field with unprecedented clarity.

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These sharper views aren't just visually

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spectacular, they're scientifically

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invaluable. They may help solve one of solar

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physics greatest mysteries. Why the corona

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blazes millions of degrees hotter than the

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solar surface itself. The technology

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also provides crucial insights into filament

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eruptions and coronal mass ejections,

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powerful blasts that can impact space weather

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and create spectacular auroras on Earth.

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Dr. Thomas Rimmel, National Solar Observatory

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chief technologist, explains that this new

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system finally closes a decades old gap

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in our observational capabilities, delivering

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images of coronal features at 63

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kilometres resolution, the theoretical limit

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of the telescope. Scientists hope to bring

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this groundbreaking technology to even larger

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telescopes, including the four metre Daniel

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K. Inouye Solar Telescope in Hawaii,

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promising an even closer look at our star's

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most dynamic regions.

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Next, some myth breaking. You might think

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that icy worlds are frozen in time and space.

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After all, they're covered in ice. But

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Jupiter's moon Europa is proving to be far

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more dynamic than previously imagined. Recent

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observations by the James Webb Space

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Telescope have revealed fascinating changes

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happening on this distant frigid world.

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Europa's surface is showing evidence of both

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amorphous and crystalline ice, Two different

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structural forms of frozen water. This

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distinction is significant because on Europa,

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the natural state should be amorphous ice. As

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the moon orbits Jupiter, Its surface is

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bombarded by charged particles Trapped in

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Jupiter's powerful magnetic field. This

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radiation bombardment Disrupts the crystal

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structure of ice, Converting it to an

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amorphous form. So. So why are scientists

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finding crystalline ice on the surface? Dr.

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Ujwal Raut of the Southwest Research

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institute Believes this points to active

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processes Bringing fresh water from below.

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Our data showed strong indications that what

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we are seeing Must be sourced from the

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interior, Perhaps from a subsurface ocean

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nearly 20 miles beneath Europa's thick, icy

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shell, Raut explains. The most

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compelling evidence Comes from an area known

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as Tara regio and a chaotic terrain

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region where scientists have detected not

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only crystalline ice, but also sodium

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chloride, Essentially table salt, along

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with carbon dioxide and hydrogen peroxide.

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The presence of these compounds Strongly

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suggests They originated from Europa's

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subsurface ocean. What's particularly

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remarkable Is how quickly these changes

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occur. In some regions, the ice is

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recrystallizing in cycles as short as two

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weeks. This rapid transformation indicates

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that Europa's surface Is likely porous and

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and warm enough in certain areas to allow for

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quick recrystallization. Despite the constant

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radiation bombardment. Scientists

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believe two main heat sources Are at work

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Beneath Europa's icy tidal heating from

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Jupiter's gravitational pull and radioactive

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decay in the moon's core. These processes

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warm the subsurface ocean and force water

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upward through cracks and fissures. This

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water may reach the surface through various

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mechanisms, including diapirs,

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Essentially stovepipes that convey warmer

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water and slush upward, or through geyser

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like plumes that shower the surface with ice

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grains. The discovery of these dynamic

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processes Adds to the mounting evidence For a

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liquid ocean Beneath Europa's icy shell,

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Making this moon one of the most promising

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places in our solar system to search for

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conditions that could support life. The

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upcoming Europa Clipper mission Will study

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these regions in much greater detail during

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its close passes of this fascinating moon,

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Potentially revealing even more About

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Europa's hidden ocean and its constant cycle

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of surface renewal.

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Finally, today, A, puzzling discovery in our

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own backyard, so to speak. In the vast

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universe of spherical objects, Planets,

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moons, and stars, Astronomers have recently

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discovered something that stands out for its

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extraordinary perfection. Deep within

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our Milky Way galaxy Lies a mysteriously

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circular object that has left researchers

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Both fascinated and puzzled. This celestial

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bubble, accidentally discovered by

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astrophysicist Miroslav Filipovi of western

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Sydney University has been named

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Teleios, after the Greek word for perfect.

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And for good reason. While scientists believe

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it's a supernova remnant, the expanding shell

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of gas and dust left behind after a massive

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stellar explosion, Teleios exhibits

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an almost unnaturally perfect form. What

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makes this discovery so remarkable is its

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astonishing symmetry. Teleios has been

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measured with a circularity score of

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95.4%, placing it among

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the most geometrically perfect supernova

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remnants ever observed. As Filipovi explains,

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this level of symmetry is extremely unusual.

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Typical supernova remnant shapes vary

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dramatically, he notes, either from

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asymmetries in the initial explosion,

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disruption from expanding into an imperfect

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environment, or various other interfering

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factors. Yet telaos displays none of these

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common irregularities. Instead, it appears to

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have expanded with almost textbook

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perfection, as if created in an idealised

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simulation rather than the chaotic reality of

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space. The secret to Teleios's perfect

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form may lie in its location. Situated

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2.2 degrees below the galactic plane, it

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exists in a region with significantly less

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interstellar gas and dust. This

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relatively empty environment has allowed the

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remnant to expand undisturbed for thousands

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of years, maintaining its symmetrical shape.

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But the mysteries of Teleios don't end with

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its shape. Unlike most supernova remnants,

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which emit radiation across multiple

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wavelengths, Teleios is only detectable in

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radio frequencies with just a hint of

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hydrogen alpha emissions. This peculiar

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characteristic has made it difficult for

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astronomers to determine exactly what type of

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stellar explosion created it. The most likely

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explanation is that Teleios resulted from a

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type 1a supernova, the spectacular death

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of a white dwarf star that consumed too much

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material from a companion star.

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Alternatively, it might be the result of a

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type 1 axe supernova, a similar but less

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common event that leaves behind a zombie

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star. However, the observable data doesn't

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perfectly match either model. Using data

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from the Australian Square Kilometre Array

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Pathfinder and the Murchison Widefield Array,

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researchers estimate that Teleios spans

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somewhere between 46 and and 157

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light years across, depending on its exact

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distance from Earth, which is still being

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determined. As researchers continue to study

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this celestial oddity, TELAOS stands as a

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reminder that the universe still has plenty

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of perfectly formed mysteries waiting to be

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unravelled by our increasingly sophisticated

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astronomical instruments.

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That wraps up today's journey through our

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cosmic neighbourhood. From Elon Musk's

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ambitious plans to reach Mars, to the

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groundbreaking discoveries about atmospheric

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loss on the Red Planet, to unprecedented

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views of our Sun's fiery corona, to

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Europa's surprisingly dynamic icy

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surface, and finally to the mysteriously

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perfect sphere called Teleios, we've covered

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quite a bit of astronomical territory today.

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These stories remind us that our

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understanding of the universe continues to

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evolve with each new observation and

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technological advancement. Whether it's

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solving ancient planetary mysteries or

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capturing never before seen solar phenomena,

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the field of astronomy remains as exciting

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and full of discovery as ever. I'm Anna, your

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host for Astronomy Daily. If you enjoyed

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today's episode, please visit our

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00:14:55.310 --> 00:14:58.230
website@astronomydaily.IO where you can

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listen to all our back episodes and find more

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information about the stories we've covered

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today. Don't forget to follow us on social

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media as well. Just search for Astro Daily

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Pod on Facebook, X, YouTube,

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00:15:13.070 --> 00:15:15.070
to stay updated with our latest content and

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join our community of space enthusiasts.

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Until next time, keep looking up.

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Sa