WEBVTT

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Anna: Welcome to Astronomy Daily. Your

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go to source for the latest happenings in

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space and astronomy. I'm Anna.

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Avery: And I'm, um, Avery. We're thrilled to have

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you join us for today's episode packed with

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fascinating updates from around our universe.

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Anna: We've got a lot to cover, from

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SpaceX's incredibly speedy trip

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to the International Space Station to some

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intriguing new findings at CERN that could

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shed light on one of the universe's biggest

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mysteries.

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Avery: Plus, as always, we'll be sharing our

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top tips for what to look for in the night

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sky this month, including a stunning

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planetary conjunction and a famous

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meteor shower. So let's dive right in.

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Anna: First up, let's talk about an impressive

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feat from SpaceX which just delivered a

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new crew to the International Space Station

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in a lightning fast 15 hours.

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Avery: That's incredibly quick, Anna. Uh, for

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context, that's just over half a day.

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The four astronauts, a mix of U.S.

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russian and Japanese crew members, launched

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from NASA's Kennedy Space center and arrived

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at the orbiting lab. Feeling pretty good, I

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imagine.

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Anna: Absolutely. Mike Thinke one of the

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NASA astronauts even radioed hello,

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Space Station. As soon as their tapsule

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docked high above the South Pacific. They're

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set to spend at least six months up there

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swapping places with the current crew who've

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been aboard since March.

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Avery: What's really interesting about this

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particular crew are their backstories.

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Zena Cardman and Mike Finke from NASA,

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Japan's Kimiya Ui and Russia's

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Oleg Plutonov each had quite a journey

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to get to this mission.

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Anna: That's right for Cardman. She was pulled from

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a SpaceX flight last year to make room for

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the two NASA astronauts who ended up stuck on

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the station due to the Boeing Starliner

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issues. Butch Wilmore and Suni Williams.

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Avery: And speaking of Starliner, both Mike

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Finke and Kimiya Yui had actually been

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training for the next Starliner mission.

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But with Starliner still grounded by

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thruster problems and other issues

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potentially until 2026,

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they switched over to SpaceX. It's a clear

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sign of how dynamic and sometimes

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unpredictable spaceflight scheduling can be.

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Anna: And Oleg, uh, Platanov, the Russian

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cosmonaut, has his own story too. He was

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bumped from a Soyuz launch lineup a couple of

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years ago due to an undisclosed illness.

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So it's great to see him back in action.

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Avery: It really is. With their arrival, the

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International Space Station temporarily has

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a population of 11. Imagine

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that many people living and working together

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in that confined space.

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Anna: Zena Cardman expressed her awe once on board,

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saying it was such an unbelievably

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beautiful sight to see the space station come

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into our view for the first time. It just

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goes to show that even for seasoned

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astronauts, the wonder of space never fades.

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Avery: And while this 15 hour trip was speedy

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by US standards, it's worth noting that the

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Russians still hold the record for the

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fastest trip to the space station, clocking

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in at a lightning fast three hours.

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Quite a difference.

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Anna: Following up on that speedy delivery to the

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iss, there's been some significant

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diplomatic movement in space this week that

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we need to talk about.

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Avery: Uh, you're talking about the first high level

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face to face meetings between NASA and

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Roscosmos in almost eight years,

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right? This is a huge deal

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considering the last time their leaders met

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was back in October 2018, which

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was before a lot of the major

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geopolitical shifts and leadership changes

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on both sides.

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Anna: Exactly. The relatively new head of

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Roscosmos, Director General Dmitry

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Bakanov actually visited the United

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States. He was here to view the launch of the

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Crew 11 mission, which included the cosmonaut

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Oleg Plitinov we just mentioned. And he also

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met with some of NASA's human space flight

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leaders in Houston.

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Avery: What's particularly striking about this visit

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is the disparity in how it was covered.

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NASA barely mentioned it, providing almost no

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public coverage. But the state operated

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Russian news service published

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multiple updates, clearly wanting to

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highlight the interaction.

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Anna: It definitely points to a different agenda.

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Toss reported that Bakanov and acting

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NASA Administrator Sean Duffy

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discussed the future of the International

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Space Station at Kennedy Space Center.

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Bakanov was quoted saying they

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agreed to continue using the ISS

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until 2028 and would work

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on the deorbiting process until

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2030. They also reportedly

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discussed potential collaborations beyond

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2030. Before Bakanov's visit,

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there was speculation that relations might

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cease entirely after the ISS's

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demise. So this suggests a potential

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shift towards some kind of ongoing

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partnership.

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Avery: This brings us to what's been termed Russia's

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charm offensive with NASA. It's clear

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Bakanov wants to reestablish warmer

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relations, but the question is, why

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now? What's driving this push?

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Anna: Well, there are a few interesting theories

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floating around. One highly speculative

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angle involves internal Russian

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politics. Bakanov is reportedly

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popular in Russia and he's managed to

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navigate a very complex political

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landscape, especially given the recent

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dismissal and tragic death of a former

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colleague from his Transportation Ministry

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days. His very public trip could be

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seen as a way to bolster his image and

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show strong international ties.

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Avery: That's quite a twist. But on a more

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direct space related note, a significant

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motivation might be tied to The International

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Space Station's deorbiting contract.

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NASA awarded SpaceX a nearly $1 billion

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contract a year ago to ensure a safety

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orbiting of the station into the Pacific.

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Anna: And before that, NASA and Roscosmos

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had actually considered using three Russian

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Progress vehicles for the deorbiting.

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However, NASA ultimately decided that the

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Russian vehicles would not provide sufficient

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margin to lower the public risk to an accept.

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Avery: So Roscosmos under Bakanov

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has apparently been urging NASA to reconsider

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using Russian vehicles. And there might be

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some interest from certain White House

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officials to reduce reliance on Elon

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Musk's companies for federal contracting.

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Especially after some reported falling out

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between President Trump and Musk a couple of

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months ago, although NASA's press

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secretary was not aware if this specific

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issue was discussed.

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Anna: It's a complex web of motivations for sure.

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Another key factor is NASA's current

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reliance on SpaceX's Dragon

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spacecraft for crewed transport to the ISS.

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Boeing's Starliner vehicle isn't expected

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to fly crew again until

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2027, and it's unlikely to

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be price competitive with Dragon.

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Avery: So having Russian Soyuz spacecraft as a

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viable option could provide NASA with a

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crucial means of avoiding a, uh, SpaceX

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monopol on crew transport, especially

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as they look towards commercial space

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stations in the 2000 and 30s. It provides

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leverage and redundancy in their access to

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space.

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Anna: It makes a lot of sense from NASA's

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perspective to keep their options open and

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maintain diverse access to space. It's not

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just about one mission, but the long term

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strategic needs for human spaceflight.

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Avery: Absolutely. This visit, despite the

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geopolitical backdrop, highlights the unique

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collaborative nature of space exploration

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and the enduring need for international

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partnerships, even when things are tense on

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Earth.

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Anna: From navigating geopolitical tensions,

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let's shift our focus to an even grander

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mystery, why our universe exists

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at all. A, uh, groundbreaking discovery at

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CERN could bring us much closer to

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answering one of the most fundamental

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questions in physics.

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Avery: You're talking about the new findings from

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the LHCB experiment, aren't you? This

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goes right to the heart of the matter

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antimatter imbalance. Which is just mind

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boggling when you think about it.

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Anna: Exactly. The core problem is,

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according to our cosmological models,

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the Big Bang should have created equal

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amounts of matter and antimatter. And if

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matter and antimatter meet, they

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annihilate each other, leaving behind

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nothing but pure energy. So

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if that were strictly true, our

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universe should just be a, uh, cosmic soup of

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energy with no stars, no

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galaxies, and certainly no us.

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But obviously that's not the case.

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Astronomical observations show that our

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universe is overwhelmingly made of

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matters with hardly any antimatter

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left. This tells us that matter

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and antimatter must behave

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differently. Somehow. There has to be

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some asymmetry that allowed matter

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to survive and dominate, while

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antimatter largely vanished. Our

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best theory of fundamental quantum physics,

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the Standard Model, does account for

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some differences between matter and

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antimatter. But these differences are

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far too small to explain the vast

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imbalance we observe. And

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that's where the new discovery comes in.

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The LHCB team at CERN

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has reported finding differences in the decay

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rates of matter particles, called

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baryons, compared to their

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antimatter counterparts,

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antibaryons. M for context,

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baryons are particles made of three

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quarks, like protons and neutrons,

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which make up most of the known matter in our

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universe. Antibaryons are made

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of three antiquarks.

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Previously, we'd seen differences in

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particles like mesons, which are made of

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a quark and an antiquark. But this is

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the first time these differences have been

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observed in baryons, which is

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hugely significant because they're the

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building blocks of most of the visible

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universe.

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Avery: Specifically, they studied over 80,000 lambda

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B baryons and their anti baryon counterparts.

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They found that these matter baryons decayed

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to specific subatomic particles, a proton,

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a kaon, and two pions, about

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5% more often than the same process happened

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with the antiparticles.

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Anna: 5% difference might sound small,

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but it's statistically significant enough to

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be the first direct observation of

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different behaviors between baryons and

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antibaryons in their decay.

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Avery: So while this particular measurement is still

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consistent with the Standard Model's

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predictions for such small differences, the

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fact that we've now observed this asymmetry

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in the type of particles that dominate our

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universe is a monumental step. It

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supports the idea that there must be

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additional fundamental particles or effects

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beyond the Standard Model that caused the

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universe to exist in its current form.

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Anna: Like finding a crucial piece of the puzzle,

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this discovery doesn't solve the whole

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mystery of why matter won out, but it

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points us in the right direction. It gives

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physicists a new avenue to explore

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for signs of that new physics that

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could finally explain the cosmic

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asymmetry after the Big Bang.

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Avery: It's incredibly exciting. With more data from

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the LHCB experiment, scientists hope to

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forensically study these differences and and

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potentially tease out the definitive signs of

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those new fundamental particles, or forces

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that are currently beyond our grasp.

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Anna: Very small to the very large.

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Let's turn Our attention now to something you

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can observe yourself, the August night

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sky. There are some fantastic sights

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to behold this month, even with the Moon

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getting in the way of one of our favorite

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annual events.

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Avery: That's right, Ana, uh, kicking things off.

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Jupiter and Venus are putting on a show.

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They'll be shining brightly in the east each

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morning before sunrise, with Venus appearing

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particularly brilliant. The real highlight

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for these two is their close meetup on August

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11th and 12th, when they'll appear just about

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a degree apart.

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Anna: It's a beautiful conjunction happening

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against a backdrop of familiar bright stars

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like Orion, Taurus and

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Gemini. And later in the month, around the

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19th and 20th, a slim lunar

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crescent will join Jupiter and Venus in the

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eastern sky, creating another

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stunning view before sunrise.

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Avery: Now, about that moon interference I

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mentioned. The annual Perseid meteor shower,

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which usually peaks overnight on August 12th

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into the 13th, is unfortunately going to be

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hampered this year. The Moon will be nearly

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84% full on the peak night, and its

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glare will wash out all but the brightest

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meteors.

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Anna: It's a bit of a bummer for Perseid

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enthusiasts, but you might still catch a

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few bright ones in the pre dawn hours.

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The good news is that the Geminids, another

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fantastic annual meteor shower in

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December, is set for Moon free viewing,

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so we have that to look forward to.

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Avery: Beyond meteors and planets, August is

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also a prime time to observe one of the

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easiest to spot nebulas in the sky, the

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Dumbbell Nebula. Also known as M

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M27. It's located high

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overhead on August nights.

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Anna: The Dumbbell Nebula is a type of object

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called a planetary nebula. Though it has

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nothing to do with planets, it's

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essentially a giant cloud of gas and

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dust that's been shed by a star like our

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sun as it reaches the end of its life.

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Once nuclear fusion ceases, these

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stars blow off their outer layers, leaving

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behind a small hot remnant called a

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white dwarf.

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Avery: That white dwarf then emits a lot of bright

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ultraviolet light, which illuminates the

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expanding shell of gas, causing it to glow

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in visible light. The Dumbbell Nebula,

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named for its shape, appears as a small,

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faint patch of light. In binoculars or a

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small telescope, you.

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Anna: Can find it within the summer triangle, a

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prominent pattern of stars in the August sky.

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It's about a third of the way between the

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bright stars Altair and Deneb.

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It's truly a glimpse into the future of our

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own sun, which will undergo a similar

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transformation about 5 billion years from

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now.

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Avery: It's a powerful reminder of the cosmic

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cycle that seeds the galaxy with the

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ingredients for new generations of stars and

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planets, and potentially even ones not too

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different from our own. It's a beautiful

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sight and a profound thought.

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Anna: And that brings us to the end of another

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fascinating episode of Astronomy Daily.

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We've covered everything from quick trips to

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the ISS and diplomatic dances in

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space, to the mysteries of antimatter

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and the beauty of our night sky.

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Avery: It's been an absolute blast. As always, Anna,

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we hope you've enjoyed diving into the latest

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space news with us. And remember, there's

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always something incredible happening above

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us.

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Anna: Absolutely. So keep looking up.

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You can find Astronomy Daily wherever you get

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your podcasts. And be sure to follow us on

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social media for more updates and behind the

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scenes content.

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Avery: Thank you for tuning in. We can't wait to

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share more cosmic adventures with you next

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time.

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Anna: Until then, this is Anna and this is

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Avery signing off. Astronomy

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Day