April 21, 2026
NASA Unveils Its Next Great Telescope - Plus Mars Ocean Proof & FAA Grounds New Glenn
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This episode of Astronomy Daily is brought to you with the support of NordVPN. When you need to do something about securing your online presence. Check out the great deal (huge savings) for our listeners...visit www.bitesz.com/nordvpn
Episode Description
In today's episode of Astronomy Daily, Anna and Avery cover six major stories from the frontiers of space and science. NASA has unveiled the fully assembled Nancy Grace Roman Space Telescope — one of the most powerful observatories ever built — with a launch as early as fall 2026. Researchers at Caltech have published striking evidence of an ancient Martian ocean, identifying a planet-wide 'bathtub ring' coastal shelf in the northern hemisphere. The FAA has formally grounded Blue Origin's New Glenn rocket following an official mishap classification after Sunday's failed satellite deployment. NASA's SPHEREx space telescope has delivered its first published science, mapping interstellar ice and organic molecules across the Milky Way in 102 infrared colours. New research warns that even habitable-zone exoplanets may not be truly habitable without sufficient water to maintain their carbon cycles. And a new study reveals that spaceflight doesn't just change astronauts' bodies — it changes their brains in ways that can linger long after they return to Earth.
Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-space-news-updates--5648921/support.
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Ensure your online privacy by using NordVPN. To get our special listener deal and save a lot of money, visit www.bitesz.com/nordvpn. You'll be glad you did!
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This episode includes AI-generated content.
This episode of Astronomy Daily is brought to you with the support of NordVPN. When you need to do something about securing your online presence. Check out the great deal (huge savings) for our listeners...visit www.bitesz.com/nordvpn
Episode Description
In today's episode of Astronomy Daily, Anna and Avery cover six major stories from the frontiers of space and science. NASA has unveiled the fully assembled Nancy Grace Roman Space Telescope — one of the most powerful observatories ever built — with a launch as early as fall 2026. Researchers at Caltech have published striking evidence of an ancient Martian ocean, identifying a planet-wide 'bathtub ring' coastal shelf in the northern hemisphere. The FAA has formally grounded Blue Origin's New Glenn rocket following an official mishap classification after Sunday's failed satellite deployment. NASA's SPHEREx space telescope has delivered its first published science, mapping interstellar ice and organic molecules across the Milky Way in 102 infrared colours. New research warns that even habitable-zone exoplanets may not be truly habitable without sufficient water to maintain their carbon cycles. And a new study reveals that spaceflight doesn't just change astronauts' bodies — it changes their brains in ways that can linger long after they return to Earth.
Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-space-news-updates--5648921/support.
Sponsor Details:
Ensure your online privacy by using NordVPN. To get our special listener deal and save a lot of money, visit www.bitesz.com/nordvpn. You'll be glad you did!
Become a supporter of Astronomy Daily by joining our Supporters Club. Commercial free episodes daily are only a click way... Click Here
This episode includes AI-generated content.
WEBVTT
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Hello, and welcome to Astronomy Daily. I'm Anna and I'm Avery.
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It is Tuesday, April twenty first, and we have a
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seriously packed episode for you today.
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We do. NASA has just pulled back the curtain on
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its next great space telescope, fully assembled and heading for
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the launchpad later this year.
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Sciences are waving a giant bathtub ring at Mars and
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saying this is proof there was once an ocean there.
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The FAA has formally grounded Blue Origins New Glen rocket
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after what is now being called an official mishap. We
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have the latest fear ax.
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NASA's extraordinary one hundred and two color Eye in the
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Sky has begun delivering science and the early results are beautiful.
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Could your favorite exoplanet be a waterless greenhouse? New research
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has a sobering answer for many worlds in the habitable zone.
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And we'll look at what spaceflight does to the human brain,
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including why those effects don't always go away when astronauts
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come home.
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All of that and more. Let's get into.
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It ready when you are take it away, Anna.
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Our first story today is one of those moments you
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want to remember. On Tuesday, NASA opened the doors of
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its giant clean room at the Goddarn Space Flight Center
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in green Belt, Maryland, and invited the world to meet
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the fully assembled Nancy Grace Roman Space Telescope, one of
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the most powerful observatories humanity has ever built.
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I have been following this telescope for years, Anna, this
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is such a big deal. What are we actually looking
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at here? So?
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The Roman Telescope is NASA's next flagship, its successor in
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many ways to Hubble and the James Webb Space Telescope.
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It's been fully integrated now, meaning it's two major components,
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the telescope itself and its instrument package, have been joined together,
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and today was one of the last chances anyone outside
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NASA will have to see it before it ships to
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the Kennedy Space Center in Florida.
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And the launch is getting close, right very close.
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NASA is targeting a launch as early as this coming fall,
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and the team says they are on track for that.
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The mission is officially scheduled no later than May twenty
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twenty seven, but fall twenty twenty six is looking genuinely achievable.
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And remind us what is Roman actually going to do?
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Because it has a very different mission to Web.
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Great question. Roman is primarily designed to serve a huge
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swaths of the sky, rather than staring deep at single
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targets the way Web does. It will map hundreds of
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millions of galaxies, probe the nature of dark energy and
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dark matter, and search for thousands of exoplanets using a
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technique called gravitational microlensing. Its field of view is roughly
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one hundred times wider than hubbles, which means it can
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map the cosmos at a scale we've simply never been
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able to do before.
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One hundred times wider. That is extraordinary. It's like going
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from a magnifying glass to a panoramic window exactly.
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Roman will essentially give us the big picture that webs can't.
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The two telescopes are designed to complement each other perfectly,
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and today's reveal was one of those reminders that it's
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really happening. The telescope is done, it's real, and it's
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almost ready to fly.
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Incredible. The universe's next great detective is suiting.
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Up all right, Where do you want to take me next?
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Savery well, I want to take you to Mars, and
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I want you to imagine draining a giant bathtub.
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Okay, I'm imagining it This is a very large.
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Bathtub planetary scale, because that is essentially what researchers at
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Caltech California Institute of Technology have been doing. They published
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a landmark study in the journal Nature this week and
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they found what they're describing as a bathtub ring around
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the northern hemisphere of Mars, a flat shelf like band
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of land up to several hundred kilometers wide that wraps
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the contours of where an ancient ocean may have once
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met dry land.
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So this is evidence of shorelines, or more precisely, content shelves.
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Exactly, and that distinction matters. Previous research had identified features
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that looked like ancient shorelines, but those were found at
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varying elevations, which was a problem. A real shoreline should
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be level. So the Caltech team, led by former postdoctoral
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scholar of Dala Zaki and geology professor Michael Lamb, took
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a different approach. They asked, instead of looking for shorelines,
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what if we look for the continental shelf.
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Itself, because on Earth, the shelf is much more stable
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and durable than the waterline.
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Precisely, they first modeled what Earth's oceans look like without
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water and found that the most reliable signature is that flat,
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wide band of land at depth the coastal plane and
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continental shelf. Then they looked at topographic data of Mars
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from orbiting spacecraft and they found exactly that a flat
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zone in the northern hemisphere, consistent with the coastal shelf
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of an ocean that once covered roughly a third of
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the planet's.
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A third of Mars. That would have made it look
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almost earth like.
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And crucially, the river deltas that geologists have already mapped
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on Mars, those triangular plains where ancient rivers flowed into
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something larger, line up beautifully with this newly identified shelf.
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Everything is telling the same story, and.
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The implications for life are significant in normans.
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If Mars had a stable ocean covering a third of
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its surface for potentially millions of years, then its northern
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lowlands may have been inhabitable and those ancient coastal sediments
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could have preserved biosignatures the same way coastal sediments on
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Earth do. The ESA's Rosalind Franklin rover, expected to land
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on Mars in twenty thirty will explored this exact region
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and could provide the definitive answer Mars.
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It turns out may have once had a bath to
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bring you could see from space.
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And that Anna is the best kind of geological metaphor.
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Now, yesterday we told you about Blue Origin's New Glen
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rocket and the difficult mission it had on Sunday. As
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a quick recap, New Glenn launched successfully. The booster landed
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successfully for the second time ever historic, but the upper
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stage failed to deliver the ast space mobile Bluebird seven
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satellite to its intended orbit. The satellite was lost.
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And today there's a significant development because the FAA has
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now formally stepped in.
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It has the Federal Aviation Administration has officially classified Sunday's
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event as a mishap, and that word carries real regulatory weight.
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New Glen is now grounded. It cannot fly again until
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Blue Origin completes a full investigation, reports its findings, and
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the FA determines that the cause of the failure does
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not pose a risk to public safety.
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So what do we know about the cause? Has Blue
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Origin said anything?
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They have? CEO Dave Limp posted a statement saying that
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early data suggests one of the b E three U
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engines in the rocket's upper stage failed to produce sufficient
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thrust during what's called this second GS two burn, a
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maneuver needed to circularize the satellite's orbit. The engine underperformed,
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the burn fell short, and the satellite ended up at
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roughly one hundred and fifty kilometers altitude instead of the
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planned four hundred and sixty kilometers, far too low to operate.
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And it's not just the FAA watching NASA, the National
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Transportation Safety Board and the US Space Force are all
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monitoring the investigation.
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As well, which tells you how seriously the industry is
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taking this. Blue Origin had up to twelve more new
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Glen missions planned for twenty twenty six, so the clock
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is ticking on getting the rocket back in the air.
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And for AST space Mobile, whose constellation of direct to
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smartphone broadband satellites depends on launches like this, the setback
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is significant. Though the company says the satellite's loss is
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covered by insurance and that three more Bluebird satellites will
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be ready to ship within thirty days, a.
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Reminder that in rocketry, even the successes can contain failures
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and vice versa. Blue Origin had a genuine historic milestone
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on Sunday, and the genuine setback.
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We'll keep watching how this investigation unfolds. Now avery, before
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we move on to our next story, I'd like to
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give a shout out to our sponsor, you know, the
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folks who help keep our podcast afloat, and today's episode
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is brought to you by nord VPN. They have some
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incredible deals for our listeners at the moment, so if
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you're looking to secure your online privacy, I would highly
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recommend NordVPN. There's a link in the show notes.
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Okay, moving on, let's go from a grounded rocket to
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a very much ungrounded space telescope because FEARX has begun
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delivering science and the early results are stunning.
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FEARX for our newer listeners, that stands for spectro Photometer
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for the History of the Universe, Epoch of Reionization and
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iss Explore and it launched just over a year ago
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in March of last year.
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And what makes fear X unlike any telescope we've ever
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flown is this. It observes the entire sky, the whole thing,
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in one hundred and two different colors or wavelengths of
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infrared light. It takes roughly thirty six hundred unique images
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every single day and is weaving them together into all
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sky maps that will eventually chart hundreds of millions of galaxies.
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So what has the first published science shown us?
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Two things of huge interest. First, ice fear x has
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mapped the chemical signatures of interstellar ice, including water, carbon dioxide,
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and carbon monoxide, across star forming regions of our Milky Way,
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including the turbulent stellar nursery known as Signus X. These
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microscopic ice crystals coating tiny dust grains in space are
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where most of the Universe's water forms and is stored.
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The water on Earth's oceans the ion commets it all
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traces back to regions like.
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These, which makes sphere x a telescope that's literally mapping
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the origins of water and possibly of life exactly.
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And second, it has mapped polycyclic aromatic hydrocarbons, complex organic
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molecules sometimes called the universe's most common carbon compounds, throughout
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the same regions. These molecules are thought to play a
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role in prebiotic chemistry, the chemistry that sets the stage
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for life.
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So right out of the gate, spherx is looking at
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the building blocks, and.
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It's only just begun. It has two years of planned
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survey operations ahead, and by the time it's done, it
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will have produced four complete all sky maps. Combined with
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what the Roman telescope will do surveying galaxies at vast scale,
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we are about to enter a golden age of sky surveys.
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I love the idea of a telescope that sees the
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whole sky and colors our eyes can't even perceive one.
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Hundred and two shades of the invisible. That's spr x.
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Now. We talk a lot on this show about planets
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in the habitable zone, that goldilocks region around a star
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where liquid water could exist on a planet's surface. But
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new research published this week asks a harder question. Is
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being in the habitable zone actually enough?
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And the answer is not necessarily.
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Not even close. It turns out the new work highlights
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something that sounds obvious once you hear it, but has
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significant implications for how we search for life. A planet
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in the habitable zone still needs substantial water to maintain
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the carbon cycle that keeps temperature stable. Without water, even
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a perfectly positioned planet can become a runaway greenhouse world,
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a Venus style hellscape, regardless of how close it sits
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to its stars sweet spot.
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So water isn't just important for life to drink, it's
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important for regulating the climate that makes life possible in
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the first place.
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Precisely on Earth, water plays a critical role in the
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cycling of carbon between the appas, hemisphere, oceans, and rocks,
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a process that has kept our planet's temperature remarkably stable
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over billions of years. Without sufficient water, that cycle breaks down,
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harbin builds up in the atmosphere, temperatures spike, and you
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end up with a planet that is technically in the
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habitable zone but is very much not habitable.
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Which changes how we should be thinking about candidate worlds.
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It does. Simply finding a planet at the right distance
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from its star is no longer enough. We need to
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be asking how much water that planet has and whether
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it's retained enough to keep its climate engine running. It
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raises the bar for what we call a truly earth
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like world, and it makes our own planet's long geological
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relationship with water look even more extraordinary. Earth really did
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win the cosmic lottery several times over. And now for
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our final story today, I want to get personal. Specifically,
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I want to get inside an as head. Literally, I
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feel like this is going somewhere I should be concerned
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about only slightly.
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A new study has found that spaceflight changes the human brain,
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not just temporarily while astronauts are in orbit, but in
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ways that can persist long after they've come home to Earth.
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We've talked before on the show about the physical toll
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of spaceflight muscle loss, bone density changes, fluid shifts, but
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what specifically is happening to the brain.
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So the study published in the Proceedings of the National
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Academy of Sciences found that after extended spaceflight, astronauts' brains
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are physically shifted in position inside the skull, tilted upward
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and moved back relative to their normal earth bound position,
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and the areas most affected are the sensory related regions
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of the brain, the ones responsible for balance, spatial orientation,
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