- Emergency Return of Shenzhou 20: China's Shenzhou 20 spacecraft is making an uncrewed emergency return to Earth after sustaining damage from a micrometeoroid, which caused a crack in its window. The crew safely returned on a different vessel, marking a significant first for China's space program.
- Galactic Neighborhoods Matter: The Deep Extragalactic Visible Legacy Survey (DEVELS) reveals that a galaxy's local environment significantly influences its evolution. Galaxies in crowded clusters exhibit slower star formation rates compared to isolated ones, providing crucial insights into cosmic evolution.
- Launch Week Extravaganza: This week sees 10 scheduled orbital launches, including five Starlink missions by SpaceX, South Korea's COMSAT 7 satellite launch by Arianespace, and Japan's H3 rocket carrying a critical GPS satellite, highlighting the rapid advancements in the global space industry.
- Ancient Mars Rivers: A new study identifies 16 massive ancient river drainage systems on Mars, suggesting a much wetter past. These findings offer promising locations for searching for signs of past Martian life, utilizing high-resolution data from Mars orbiters.
- Solar Activity Alert: The sun has unleashed a powerful X 1.9 class solar flare, causing radio blackouts and raising concerns about future solar activity. Forecasters are closely monitoring a larger sunspot region that could impact Earth with potential geomagnetic disturbances.
- Sustainable Space Practices: Experts advocate for a circular space economy to combat space debris, emphasizing the importance of designing durable, repairable satellites and creating multi-purpose space stations to ensure sustainable operations in orbit for future generations.
- For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, TikTok, and our new Instagram account! Don’t forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.
- Thank you for tuning in. This is Avery and Anna signing off. Until next time, keep looking up and exploring the wonders of our universe.
Shenzhou 20 Emergency Return
[China National Space Administration](http://www.cnsa.gov.cn/)
DEVELS Survey Findings
[Astronomy Journal](https://www.astronomy.com/)
Launch Week Highlights
[NASA Launch Schedule](https://www.nasa.gov/launchschedule)
Mars River Systems Study
[Mars Reconnaissance Orbiter](https://mars.nasa.gov/mro/)
Solar Activity Reports
[NOAA Space Weather Prediction Center](https://www.swpc.noaa.gov/)
Circular Space Economy Initiatives
[Astroscale](https://astroscale.com/)
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This episode includes AI-generated content.
00:00:00 --> 00:00:03 Avery: Hello, and welcome to Astronomy Daily, the
00:00:03 --> 00:00:05 podcast that brings you the biggest news from
00:00:05 --> 00:00:08 across the cosmos. I'm Avery, and as always,
00:00:08 --> 00:00:10 I'm joined by the brilliant Anna.
00:00:10 --> 00:00:13 Anna: Hi, Avery. And hello to all our listeners.
00:00:14 --> 00:00:16 We have a packed show today covering
00:00:16 --> 00:00:19 everything from drama in low Earth orbit
00:00:19 --> 00:00:21 to the ancient history of Mars.
00:00:22 --> 00:00:23 Avery: It's going to be a great one.
00:00:23 --> 00:00:26 Let's start with a story that sounds like
00:00:26 --> 00:00:28 something out of a movie. A damaged
00:00:28 --> 00:00:31 spacecraft making an emergency return to
00:00:31 --> 00:00:31 Earth.
00:00:32 --> 00:00:34 Anna: That's right. We're talking about China's
00:00:34 --> 00:00:37 Shenzhou 20 spacecraft. It was
00:00:37 --> 00:00:39 up at the Tiangong Space Station,
00:00:40 --> 00:00:42 but it's now being sent back to Earth
00:00:42 --> 00:00:45 uncrewed after sustaining some damage.
00:00:45 --> 00:00:48 Avery: Damage from what? This is the scary
00:00:48 --> 00:00:49 part of space travel.
00:00:50 --> 00:00:52 Anna: The suspected culprit is a
00:00:52 --> 00:00:55 micrometeoroid estimated to be smaller
00:00:55 --> 00:00:57 than 1 millimeter. It appears to have caused
00:00:57 --> 00:01:00 a crack in the window of the return capsule.
00:01:01 --> 00:01:04 Avery: Wow. Less than 1 millimeter. It's
00:01:04 --> 00:01:06 amazing how something so tiny can be such a
00:01:06 --> 00:01:09 huge threat at orbital velocities. So
00:01:09 --> 00:01:10 what happened to the crew?
00:01:11 --> 00:01:13 Anna: Well, this is where the safety protocols
00:01:13 --> 00:01:16 really shine. The crew was forced to return
00:01:16 --> 00:01:19 to Earth on a different vessel, the Shenzhou
00:01:19 --> 00:01:22 UH19, which was docked
00:01:22 --> 00:01:24 as a lifeboat. This is actually a first for
00:01:24 --> 00:01:27 China space program having to use a backup
00:01:27 --> 00:01:28 ride home like this.
00:01:29 --> 00:01:32 Avery: That's a testament to good planning. So now
00:01:32 --> 00:01:34 they're bringing the damaged capsule back on
00:01:34 --> 00:01:36 its own to figure out exactly what happened.
00:01:37 --> 00:01:39 Anna: Exactly. The uncrewed return will
00:01:39 --> 00:01:42 allow engineers to inspect the damage up
00:01:42 --> 00:01:45 close. It's a critical learning opportunity
00:01:45 --> 00:01:47 for understanding the real world risks of
00:01:47 --> 00:01:50 orbital debris and micrometeoroids.
00:01:50 --> 00:01:51 Avery: Absolutely.
00:01:51 --> 00:01:53 Now, from the dangers in our cosmic
00:01:53 --> 00:01:56 neighborhood, let's zoom way out
00:01:56 --> 00:01:59 to look at how a galaxy's neighborhood
00:01:59 --> 00:02:01 shapes its entire life.
00:02:01 --> 00:02:04 Anna: Right. This comes from a huge project
00:02:04 --> 00:02:07 called the Deep Extragalactic Visible
00:02:07 --> 00:02:10 Legacy Survey, or DEVELS for short.
00:02:10 --> 00:02:13 Avery: Gotta love the acronyms. So what did the
00:02:13 --> 00:02:14 Devils survey find?
00:02:15 --> 00:02:18 Anna: It confirmed something astronomers have long
00:02:18 --> 00:02:21 that a galaxy's local environment, its
00:02:21 --> 00:02:24 neighborhood, has a huge impact on its
00:02:24 --> 00:02:24 evolution.
00:02:25 --> 00:02:27 Avery: So it's cosmic real estate. Location,
00:02:27 --> 00:02:30 location, location, pretty much.
00:02:30 --> 00:02:33 Anna: The data shows that galaxies in more crowded
00:02:33 --> 00:02:35 environments, like dense galaxy clusters,
00:02:35 --> 00:02:38 have much slower star forming rates compared
00:02:38 --> 00:02:41 to their more isolated cousins out in the
00:02:41 --> 00:02:41 cosmic voids.
00:02:42 --> 00:02:45 Avery: That makes sense. In a crowded cluster, there
00:02:45 --> 00:02:48 are more gravitational interactions, more
00:02:48 --> 00:02:50 mergers and processes like radio
00:02:51 --> 00:02:53 ram pressure stripping. Where a, uh, galaxy's
00:02:53 --> 00:02:56 star forming gas can be torn away as it moves
00:02:56 --> 00:02:57 through the cluster.
00:02:57 --> 00:03:00 Anna: That's the leading theory. And this new data
00:03:00 --> 00:03:02 release from doubles provides some of the
00:03:02 --> 00:03:05 strongest evidence yet to back it up, it
00:03:05 --> 00:03:08 helps us understand why some galaxies are
00:03:08 --> 00:03:10 vibrant and full of new stars, while
00:03:10 --> 00:03:13 others are old, red and um, retired.
00:03:13 --> 00:03:16 Avery: It's cosmic evolution in action. The
00:03:16 --> 00:03:18 Devils survey is essentially creating a
00:03:18 --> 00:03:20 census of these different galactic
00:03:20 --> 00:03:23 lifestyles, helping us piece together the
00:03:23 --> 00:03:26 complete life cycle of galaxies across the
00:03:26 --> 00:03:26 universe.
00:03:26 --> 00:03:28 Anna: A fascinating study indeed.
00:03:29 --> 00:03:31 Avery: Speaking of crowded environments, things are
00:03:31 --> 00:03:34 getting very busy right here at home. This
00:03:34 --> 00:03:37 week is absolutely jam packed with launches.
00:03:37 --> 00:03:40 Anna: It really is. There are 10
00:03:40 --> 00:03:43 orbital launches on the calendar. Let's
00:03:43 --> 00:03:44 run through the highlights.
00:03:45 --> 00:03:47 Avery: Leading the charge as usual is SpaceX.
00:03:48 --> 00:03:50 They have a staggering five Starlink
00:03:50 --> 00:03:52 deployment missions scheduled for this week
00:03:52 --> 00:03:55 alone. The the Internet constellation just
00:03:55 --> 00:03:55 keeps growing.
00:03:56 --> 00:03:58 Anna: Then over in French Guiana,
00:03:58 --> 00:04:01 Arianespace is set to launch South Korea's
00:04:01 --> 00:04:04 COMSAT 7 satellite, which is a
00:04:04 --> 00:04:06 very high resolution Earth observation
00:04:06 --> 00:04:07 satellite. Mhm.
00:04:08 --> 00:04:10 Avery: And don't forget Rocket Lab. They're
00:04:10 --> 00:04:12 launching from New Zealand carrying the RAISE
00:04:12 --> 00:04:15 4 demonstrator satellite for JAXA, the
00:04:15 --> 00:04:16 Japanese Space agency.
00:04:17 --> 00:04:20 Anna: And speaking of Japan, their own
00:04:20 --> 00:04:22 new heavy lift rocket, the H3
00:04:22 --> 00:04:25 is slated to launch a crucial N
00:04:25 --> 00:04:28 satellite for their national GPS system.
00:04:28 --> 00:04:31 Plus China has two of their own launches
00:04:31 --> 00:04:33 scheduled. It's non stop.
00:04:33 --> 00:04:35 Avery: That uh, H3 rocket launch for Japan is
00:04:35 --> 00:04:37 particularly significant, isn't it? They've
00:04:37 --> 00:04:39 had a few setbacks with that program.
00:04:39 --> 00:04:42 Anna: It is. The H3 is Japan's
00:04:42 --> 00:04:45 next generation flagship rocket, designed
00:04:45 --> 00:04:47 to be more affordable and flexible than its
00:04:47 --> 00:04:50 predecessor. A successful launch is crucial
00:04:50 --> 00:04:53 for securing Japan's independent access to
00:04:53 --> 00:04:56 space and for competing in the commercial
00:04:56 --> 00:04:58 launch market. This mission will be a major
00:04:58 --> 00:05:01 test of its capabilities and reliability
00:05:01 --> 00:05:03 after a failure on its debut flight.
00:05:03 --> 00:05:06 Avery: And um, the COMSAT 7 for South Korea, what's
00:05:06 --> 00:05:07 its primary role?
00:05:08 --> 00:05:11 Anna: COMSAT 7 is a powerful reconnaissance
00:05:11 --> 00:05:13 satellite. With its very high resolution
00:05:13 --> 00:05:16 imaging, it can be used for national
00:05:16 --> 00:05:18 security, disaster monitoring and
00:05:18 --> 00:05:21 managing natural resources. It's part of a
00:05:21 --> 00:05:24 growing trend of nations developing their own
00:05:24 --> 00:05:26 advanced Earth observation capabilities.
00:05:27 --> 00:05:29 Avery: It really shows you the current pace of the
00:05:29 --> 00:05:30 global space industry.
00:05:30 --> 00:05:33 Okay, from low Earth orbit, let's journey to
00:05:33 --> 00:05:36 a place that was once much more active. The
00:05:36 --> 00:05:38 surface of Mars.
00:05:38 --> 00:05:41 Anna: This is one of my favorite stories this week.
00:05:41 --> 00:05:44 A new study has produced an Incredible
00:05:44 --> 00:05:47 map of 16 massive ancient
00:05:47 --> 00:05:49 river drainage systems on Mars.
00:05:49 --> 00:05:52 Avery: 16 separate systems. Are we talking about
00:05:52 --> 00:05:53 small streams here?
00:05:54 --> 00:05:57 Anna: Not at all. The study says these systems
00:05:57 --> 00:05:59 are similar in scale to some of the large
00:05:59 --> 00:06:02 drainage basins we see on Earth. And
00:06:02 --> 00:06:04 get this combined, these 16
00:06:04 --> 00:06:07 systems transported nearly half of all the
00:06:07 --> 00:06:10 sediment that was ever moved by rowers on
00:06:10 --> 00:06:12 Mars. They were enormous.
00:06:12 --> 00:06:15 Avery: Half of all the sediment. That's mind
00:06:15 --> 00:06:17 Boggling. It paints a picture of a very
00:06:17 --> 00:06:20 different, very wet ancient Mars.
00:06:20 --> 00:06:22 And I assume this has big implications for
00:06:22 --> 00:06:23 the search for life.
00:06:23 --> 00:06:26 Anna: Absolutely. The researchers identified these
00:06:26 --> 00:06:29 locations as extremely promising places to
00:06:29 --> 00:06:32 search for signs of past Martian life. If
00:06:32 --> 00:06:35 life ever existed on Mars. These ancient
00:06:35 --> 00:06:38 water carved riverbeds and deltas are some
00:06:38 --> 00:06:40 of the best places we could possibly look for
00:06:40 --> 00:06:41 evidence.
00:06:41 --> 00:06:43 Avery: It's incredible to think about how they piece
00:06:43 --> 00:06:46 this together. How do they map rivers that
00:06:46 --> 00:06:47 dried up billions of years ago?
00:06:48 --> 00:06:50 Anna: They use high resolution topographic data
00:06:50 --> 00:06:53 from orbiters like the Mars Reconnaissance
00:06:53 --> 00:06:55 Orbiter. Scientists can trace the faint
00:06:55 --> 00:06:58 outlines of river channels, deltas, and
00:06:58 --> 00:07:01 alluvial fans carved into the landscape.
00:07:01 --> 00:07:03 By analyzing the geology and the
00:07:03 --> 00:07:06 mineralogy, looking for clays and
00:07:06 --> 00:07:08 carbonates that typically form in water, they
00:07:08 --> 00:07:11 can confirm these were indeed liquid water
00:07:11 --> 00:07:14 environments. It's like planetary scale
00:07:14 --> 00:07:15 archaeology.
00:07:15 --> 00:07:17 Avery: And if we do center over there, what kind of
00:07:17 --> 00:07:20 biosignatures would they look for? Not
00:07:20 --> 00:07:21 fossils, I imagine.
00:07:21 --> 00:07:24 Anna: Probably not complex fossils. They'd be
00:07:24 --> 00:07:26 searching for chemical biosignatures,
00:07:26 --> 00:07:29 specific organic molecules or isotopic
00:07:29 --> 00:07:32 ratios that are difficult to explain through
00:07:32 --> 00:07:35 non biological processes. Finding
00:07:35 --> 00:07:37 preserved microbial mats or
00:07:37 --> 00:07:39 stromatolite like structures would be the
00:07:39 --> 00:07:42 absolute jackpot. But chemical traces are
00:07:42 --> 00:07:43 a more likely target.
00:07:43 --> 00:07:45 Avery: Well, let's hope a future rover gets to visit
00:07:45 --> 00:07:47 one of those spots. Okay.
00:07:47 --> 00:07:50 While Mars's water is long gone, our own
00:07:50 --> 00:07:52 star is incredibly active right now.
00:07:53 --> 00:07:55 Anna: That's an understatement. The sun
00:07:55 --> 00:07:58 just unleashed a powerful X 1.9
00:07:58 --> 00:08:00 class solar flare.
00:08:00 --> 00:08:03 Avery: And as a reminder for everyone, X class
00:08:03 --> 00:08:05 flares are the biggest and most energetic
00:08:05 --> 00:08:08 category. This was a major event.
00:08:08 --> 00:08:11 Anna: It was. It erupted from a newly
00:08:11 --> 00:08:14 emerged sunspot region and caused a
00:08:14 --> 00:08:16 strong shortwave rain radio blackout over
00:08:16 --> 00:08:18 Australia and the surrounding region.
00:08:19 --> 00:08:21 Avery: But that's not even the main event, is it?
00:08:21 --> 00:08:23 Uh, there's something bigger on the horizon.
00:08:24 --> 00:08:27 Anna: Correct. The sunspot region that caused this
00:08:27 --> 00:08:29 flare is concerning. But an even larger
00:08:29 --> 00:08:32 and more complex region is now rotating
00:08:32 --> 00:08:35 into an Earth facing position. This is the
00:08:35 --> 00:08:38 very same sunspot that was responsible for
00:08:38 --> 00:08:40 the powerful flares and incredible
00:08:40 --> 00:08:42 aurora displays we saw last month.
00:08:43 --> 00:08:46 Avery: So space weather forecasters are watching
00:08:46 --> 00:08:48 it very, very closely. We could be in for
00:08:48 --> 00:08:50 another active period.
00:08:51 --> 00:08:53 Anna: Indeed. And it's important to remember
00:08:53 --> 00:08:56 the potential impact. A strong
00:08:56 --> 00:08:59 Earth directed coronal mass ejection, which
00:08:59 --> 00:09:02 often accompanies these big flares, could
00:09:02 --> 00:09:04 disrupt our power grids, damage satellites,
00:09:04 --> 00:09:07 and interfere with GPS and communications.
00:09:07 --> 00:09:10 We're far more technologically dependent now
00:09:10 --> 00:09:12 than we were during the last major solar
00:09:12 --> 00:09:13 maximum.
00:09:14 --> 00:09:16 Avery: So this isn't just about pretty auroras.
00:09:16 --> 00:09:19 There's a real need for accurate space
00:09:19 --> 00:09:21 weather forecasting to protect our
00:09:21 --> 00:09:22 infrastructure.
00:09:22 --> 00:09:25 Anna: Exactly. Agencies like
00:09:25 --> 00:09:28 NOAA's Space Weather Prediction center work
00:09:28 --> 00:09:31 around the clock to monitor the sun. Their
00:09:31 --> 00:09:33 warnings give satellite operators time to put
00:09:33 --> 00:09:36 their spacecraft into safe modes and utility
00:09:36 --> 00:09:39 companies time to prepare their grids for
00:09:39 --> 00:09:42 potential geomagnetic disturbances. It's a
00:09:42 --> 00:09:44 critical and often unseen, um, line of
00:09:44 --> 00:09:44 defense.
00:09:45 --> 00:09:46 Avery: Definitely.
00:09:46 --> 00:09:49 Now all this activity we've discussed, the
00:09:49 --> 00:09:52 launches, the satellites, the debris,
00:09:52 --> 00:09:55 it all leads into our final story, which is
00:09:55 --> 00:09:58 about finding a sustainable way to
00:09:58 --> 00:09:59 operate in space.
00:10:00 --> 00:10:02 Anna: Right. The growing problem of space
00:10:02 --> 00:10:05 debris. What's the new idea for tackling it?
00:10:06 --> 00:10:09 Avery: Experts are strongly advocating for what they
00:10:09 --> 00:10:11 call a circular space economy.
00:10:12 --> 00:10:14 The ide is to move away from the traditional
00:10:14 --> 00:10:17 model of launching something, using
00:10:17 --> 00:10:20 it and then abandoning it in orbit.
00:10:21 --> 00:10:23 Anna: So it's about applying the principles of
00:10:23 --> 00:10:26 recycling and reuse that we talk about on um,
00:10:26 --> 00:10:28 Earth. But in orbit.
00:10:28 --> 00:10:31 Avery: Exactly. This means designing satellites
00:10:31 --> 00:10:33 and spacecraft for durability, for
00:10:33 --> 00:10:36 easier repair, and for potential reuse
00:10:36 --> 00:10:39 or recycling of their components. It also
00:10:39 --> 00:10:42 involves creating multi purpose space
00:10:42 --> 00:10:45 stations that can serve as in orbit, repair
00:10:45 --> 00:10:47 and refueling depots, and developing
00:10:47 --> 00:10:50 technologies to actively go and recover
00:10:50 --> 00:10:51 existing debris.
00:10:51 --> 00:10:54 Anna: It's a huge but necessary shift in
00:10:54 --> 00:10:57 mindset. If we want space to remain
00:10:57 --> 00:11:00 accessible for future generations, we
00:11:00 --> 00:11:02 can't keep treating it like an infinite
00:11:02 --> 00:11:03 resource.
00:11:03 --> 00:11:06 Avery: That's the core of the argument. It's about
00:11:06 --> 00:11:08 building a sustainable future, not just for
00:11:08 --> 00:11:10 Earth, but for our activities beyond.
00:11:12 --> 00:11:14 Anna: Seems like a monumental task. Are
00:11:14 --> 00:11:16 there companies actively working on this
00:11:16 --> 00:11:19 technology now or is it still mostly
00:11:19 --> 00:11:20 theoretical?
00:11:20 --> 00:11:23 Avery: Oh, it's very much moving from theory to
00:11:23 --> 00:11:26 practice. You have companies like Astroscale
00:11:26 --> 00:11:29 developing satellites designed to capture and
00:11:29 --> 00:11:31 deorbit space debris. Others are working on
00:11:31 --> 00:11:34 robotic arms for in orbit servicing to
00:11:34 --> 00:11:37 repair and refuel existing satellites,
00:11:37 --> 00:11:40 extending their operational lives. Even
00:11:40 --> 00:11:43 NASA is investing in technologies for in
00:11:43 --> 00:11:45 space manufacturing and assembly, which
00:11:45 --> 00:11:48 reduces the need to launch massive
00:11:48 --> 00:11:50 monolithic structures from Earth.
00:11:51 --> 00:11:53 Anna: So the building blocks are being put in
00:11:53 --> 00:11:56 place. It's not just about cleaning up the
00:11:56 --> 00:11:59 mess, but also about building smarter from
00:11:59 --> 00:11:59 the start.
00:12:00 --> 00:12:02 Avery: That's the fundamental shift. Sustainability
00:12:03 --> 00:12:05 have to be part of the design process from
00:12:05 --> 00:12:08 day one. It's an investment that will pay off
00:12:08 --> 00:12:10 by ensuring that the opportunities of space
00:12:11 --> 00:12:13 remain available for the long term.
00:12:13 --> 00:12:14 Anna: I couldn't have said it better.
00:12:15 --> 00:12:18 Avery: A uh, perfect note to end on. And that is all
00:12:18 --> 00:12:20 the time we have for today's journey through
00:12:20 --> 00:12:22 the latest in space and astronomy.
00:12:23 --> 00:12:25 Anna: From near Earth challenges to the grand scale
00:12:25 --> 00:12:28 of the universe, there's always something new
00:12:28 --> 00:12:30 to discover. Thank you for tuning in.
00:12:30 --> 00:12:31 Avery: I'm Avery.
00:12:32 --> 00:12:34 Anna: And I'm Anna. Join us tomorrow for another
00:12:34 --> 00:12:37 episode of Astronomy Daily. Until then,
00:12:37 --> 00:12:40 clear skies, everyone. And keep looking up.
00:12:52 --> 00:13:04 Avery: Sam.