April 22, 2025
Exploring the Cosmos Asteroid Donaldjohanson, Mercury's Gem, and a Busy Launch Week
In this episode of Astronomy Daily, join host Anna as she navigates through a thrilling array of cosmic stories that stretch from our solar system's asteroids to the mysteries of ancient galaxies. Get ready to discover NASA's Lucy spacecraft's...
In this episode of Astronomy Daily, join host Anna as she navigates through a thrilling array of cosmic stories that stretch from our solar system's asteroids to the mysteries of ancient galaxies. Get ready to discover NASA's Lucy spacecraft's remarkable encounter with the uniquely shaped asteroid Donaldjohanson, delve into the surprising possibility of a diamond layer beneath Mercury's surface, and catch up on an exciting launch schedule that showcases the future of space exploration.
Highlights:
- NASA's Lucy Spacecraft Meets Asteroid Donaldjohanson: Experience the groundbreaking insights from Lucy's second asteroid encounter, revealing the intriguing contact binary structure of Donaldjohanson. With its unexpected shape and complex geology, this asteroid challenges our understanding of cosmic evolution.
- Mercury's Hidden Diamond Layer: Uncover the astonishing discovery that Mercury may harbor a diamond layer beneath its surface. This finding, stemming from NASA's MESSENGER mission, could explain the planet's strong magnetic field and offers a new perspective on planetary formation.
- Busy Launch Schedule: Stay informed as we highlight an action-packed week in space launches, including China's Shenzhou 20 mission to the Tiangong Space Station and multiple Falcon 9 missions from SpaceX, showcasing advancements in crewed spaceflight and satellite technology.
- Amazon's Project Kuiper Launch Date: Get the latest on Amazon's ambitious Project Kuiper, as it prepares for its inaugural satellite launch, marking a significant milestone in the race for global broadband coverage through a constellation of satellites.
- Radioluna: A Lunar Mission to Detect Ancient Signals: Explore the innovative Radioluna project, which aims to deploy a satellite fleet around the moon to capture radio signals from the universe's dark ages, using the moon's far side as a unique radio quiet zone.
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 Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.
00:00 - Welcome to Astronomy Daily
01:05 - NASA's Lucy spacecraft meets asteroid Donaldjohanson
10:30 - Mercury's hidden diamond layer
17:00 - Busy launch schedule
22:15 - Amazon's Project Kuiper launch date
27:30 - Radioluna: a lunar mission to detect ancient signals
✍️ Episode References
NASA's Lucy Mission
[NASA](https://www.nasa.gov/)
Mercury's Diamond Layer Study
[NASA MESSENGER](https://www.nasa.gov/mission_pages/messenger/main/index.html)
China's Tiangong Space Station
[China National Space Administration](http://www.cnsa.gov.cn/)
Amazon's Project Kuiper
[Amazon](https://www.amazon.com/)
Radioluna Project
[Blue Skies Space](https://www.blueskiesspace.com/)
Astronomy Daily
[Astronomy Daily](http://www.astronomydaily.io/)
Become a supporter of this podcast:
WEBVTT
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Hello and welcome to Astronomy Daily, your daily dose of
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cosmic news and celestial happenings. I'm anna your guide through
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the cosmos. Today, we've got a stellar lineup of space
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stories that will take us from nearby asteroids to the
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mysteries of distant galaxies. We'll explore NASA's Lucy spacecraft and
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its fascinating encounter with the uniquely shaped asteroid Donald Johanson,
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dive into the surprising discovery of a potential diamond layer
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inside Mercury, and catch up on this week's busy launch schedule.
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We'll also look at Amazon's Project Kuiper as it prepares
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for a milestone launch, and examine an ambitious plan to
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place satellites around the Moon to detect radio signals from
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the universe's ancient dark ages. So buckle up for a
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journey across our Solar System and beyond as we explore
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the latest developments in space exploration and astronomical discovery. Let's
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get started. NASA's Lucy spacecraft has just completed its second
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asteroid encounter, giving us an unprecedented view of asteroid Donald
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Johansson from approximately six hundred miles away. The images which
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started arriving on April twentieth, twenty twenty five, have already
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revealed some fascinating details about this cosmic object that formed
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roughly one hundred fifty million years ago. Scientists had previously
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observed large brightness variations from Donald Johansson over a ten
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day period, suggesting it might be an elongated body, but
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when Lucy's first images came in, they showed something even
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more intriguing. What appears to be a contact binary, essentially
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two smaller bodies that collided and stuck together. What's particularly
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striking about Donald Johansson is the unusual shape of the
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narrow neck connecting its two lobes. Mission scientists describe it
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as looking like two nested ice cream cones. This unique
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structure wasn't what the team expected and adds another puzzle
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piece to our understanding of how asteroids form and evolve.
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Preliminary analysis from Lucy's the Lory imager indicates Donald Johanson
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is larger than originally estimated, about five miles long and
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two miles wide at its widest point. The full asteroid
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wasn't initially visible in the high resolution images because it's
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actually larger than the imager's field of view. The team
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expects to download the complete data set over the coming week,
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which should provide a more comprehensive picture of the asteroids shape.
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Hal Leveson, Lucy's principal investigator, notes that asteroid Donald Johanson
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has strikingly complicated geology. As we study the complex structures
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in detail, they will reveal important information about the building
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blocks and collisional processes that form the planets in our
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Solar system. While Donald Johansson isn't a primary target for
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the Lucy mission, this flyby served as a full dress
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rehearsal for future encounters. The spacecraft conducted a series of
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dense observations to maximize data collection. In addition to images,
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Lucy's other scientific instruments, the Laralf color Imager and infrared spectrometer,
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along with the Latis Thermal Infrared Spectrometer, collected data that
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will be analyzed in the coming weeks. Lucy will spend
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most of the remainder of twenty twenty five traveling through
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the main asteroid belt before reaching its first main target,
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the Jupiter Trojan asteroid euribites, in August twenty twenty seven.
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The spacecraft's ultimate mission is to study these Trojan asteroids,
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which orbit the Sun in the same path as Jupiter
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and are considered time capsules from the early Solar System.
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As Tom Statler, programmed scientist for Lucy at NASA Headquarters,
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put it, these early images of Donald Johansson are again
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showing the tremendous capabilities of the Lucy spacecraft as an
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engine of discovery. The potential to really open a new
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window into the history of our Solar System when Lucy
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gets to the Trojan asteroids is immense. Let's get a
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little update on Mercury and a finding that might make
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the planet a lot more attractive to some people. Mercury
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may be the closest planet to the Sun and often
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overlooked in our cosmic neighborhood, but scientists have recently discovered
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something truly dazzling about this scorched world. New research suggests
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that Mercury may be hiding a diamond layer approximately ten
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miles thick beneath its surface. This extraordinary finding comes from
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analyzing data collected by NASA's Messenger spacecraft, which mapped Mercury
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in detail during its mission. The spacecraft detected graphite patches
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scattered across Mercury's crust, indicating the planet once had a
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magma ocean incredibly rich in carbon content, higher than any
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other rocky world in our Solar System. When this ancient
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magma ocean cooled, lighter carbon floated upward, creating the dark
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graphite patches visible on the surface. Meanwhile, denser materials, including carbon,
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sank inward. According to researchers from China and Belgium led
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by doctor janhow Lynn, this heavier carbon descended alongside sinking
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metal and recrystallized into diamond under immense pressure. To test
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this theory, scientific tis recreated Mercury's interior conditions in a laboratory.
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They used a specialized press to squeeze synthetic mantle rock
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to seven gigapascals roughly seven times the pressure found at
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the bottom of the Mariana Trench, while heating it to
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nearly three thousand, six hundred degrees fahrenheit. Their experiments confirmed
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that at Mercury's core mantle boundary, with its unique pressure
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and temperature conditions, carbon transforms from graphite into diamond. These
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diamonds would theoretically form a sparkling shell up to eleven
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miles thick around the planet's metallic core. This diamond layer
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may also explain another Mercury mystery, its surprisingly strong magnetic field.
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For a planet only slightly wider than the continental United States,
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Mercury maintains a robust magnetic field that requires heat to
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flow out of the core diamond, being an excellent thermal conductor,
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would efficiently funnel this energy upward, helping to maintain the
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magnetic dynamo that generates the field. Unlike Earth, Mars, and Venus,
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which lost most of their carbon to space or locked
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it in carbonates, Mercury appears to have hoarded its carbon,
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first as floating graphite and then as diamond sinking to
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great depths. While we can't directly observe Mercury's interior, the
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European Japanese BEPY Columbo mission currently en route to the
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planet may provide conformation When it arrives in twenty thirty.
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Its instruments will refine gravity maps and look for twists
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in Mercury's magnetic field that could reveal the presence of
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this superconductive diamond layer. This discovery isn't about finding gemstones
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for jewelry. It's about understanding planetary evolution. Carbon's behavior shapes
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a planet's heat flow, cross composition, and even its magnetic field.
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By tracing carbon's journey through mercury, scientists can refine models
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that apply to worlds throughout our universe, including those orbiting
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distance stars. What initially appears is just a scorched ball
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of rock is revealing exotic physics and hidden secrets that
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are absolutely worth exploring further. Time to take a look
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at this week's launch calendar. This week is shaping up
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to be a busy one for space launches, with missions
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taking off from around the globe. Let's start with China's
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upcoming crude mission to their Tiangong space station. On Thursday,
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April twenty fourth, the Changjang Ti F rocket will lift
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off from the Juquan Satellite Launch Center carrying three taikanats
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on the Shenho twenty mission. This marks China's fifteenth crewed
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space flight and the ninth crew transportation mission to their
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space station. While the three crew members were selected back
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in February, China typically doesn't officially announce their names until
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about a day before launch. The Shenzho twenty crew will
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replace the current occupants of the station, song Ling Dong
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Kai Shuji and Wang Houzi, who have spent the past
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six months in orbit. Once a formal handover ceremony is completed,
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the Shenzho nineteen crew will return to Earth. SpaceX is
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having a particularly active week, with three Falcon nine launches
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on their manifest. The first is their third bandwagon ride
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share mission, scheduled for Monday evening from Cape Canaveral. Bandwagon
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missions carry multiple smaller satellites to mid inclination low Earth orbits,
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complementing SpaceX's transporter missions, which primarily target Sun synchronous orbits.
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Notable payloads on this flight include vasts Haven Demo technology
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demonstrator weighing approximately five hundred kilograms at miss space Cargo's
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Phoenix one prototype re entry capsule, which will test an
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innovative inflatable heat shield, and several Earth observation satellites from
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Hawkeye three hundred and sixty. The Falcon nine boosters supporting
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this mission B one THOY ninety will be making its
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third flight and is scheduled to return for a landing
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at Cape Canaveral's Landing Zone two. SpaceX has two more
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starlink launches planned later in the week, one from Florida
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on Thursday evening, carrying satellites for Starlink Group six seventy four,
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and another from Vandenberg in California on Friday afternoon for
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Starlink Group eleven nine. These launches continue the rapid expansion
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of SpaceX's Internet Mega Constellation, which now connects over five
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million users across one hundred twenty five countries. Meanwhile, Firefly
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Aerospace is preparing to launch its Alpha Rocket from Vandenberg
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Space Force Base on Sunday. This mission, playfully dubbed Message
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in a Booster, will carry Lockheed Martin's LM four hundred
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technology demonstration satellite. This marks the sixth launch of Firefly's
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Alpha Rocket and the second flight in a multi launch
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agreement with Lockheed Martin that could span up to twenty
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five launches over the next five years. The LM four
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hundred is Lockheed's new mid sized satellite bus. Designed for versatility.
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It can accommodate various missions including remote sensing, communications, imaging,
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and radar operations. This pathfinder mission will help prove the
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technology in orbit before it's used for customer missions. All
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these launches underscore the growing CADI and diversity of space
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missions from crude flights and satellite deployments to technology demonstrations
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that push the boundaries of what's possible beyond Earth. Speaking
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of launches, after multiple delays, we finally have a new
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launch date for Amazon's Project Kuiper Internet satellite constellation. United
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Launch Alliance announced that the first batch of twenty seven
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operational Kuiper satellites will lift off aboard an Atlas V
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rocket on April twenty eighth at seven pm Eastern Time
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from Cape Canaveral Space Force Station in Florida. ULA has
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set aside a two hour launch window for this mission.
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This launch, designated Kuyper one, marks a significant milestone as
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the first of a planned eighty three launches needed to
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deploy Amazon's ambitious broadband constellation. The company aims to place
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more than three thouy two hundred satellites in low Earth
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orbit to provide global high speed Internet coverage. These satellites
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aren't Amazon's first space hardware. The company successful launched two
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prototype Kuper satellites last year to validate the technology and
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pave the way for this operational fleet. The upcoming mission
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will utilize ULA's Atlas V rocket in its most powerful
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five to five to one configuration featuring five solid rocket boosters.
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This launch also represents a historic moment for ULA, as
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it marks the two hundred and fiftieth flight of a
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Centaur upper stage atop an Atlass rocket. The launch was
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originally scheduled for early April, but was postponed due to
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unfavorable weather conditions. When asked about subsequent delays, ULA CEO
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Tory Bruno simply cited range availability as the limiting factor,
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suggesting congestion in the Eastern range launch schedule managed by
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the US Space Force. While Amazon has contracted ULA for
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seven more Kuiper missions on Atlas V rockets, the company
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is diversifying its launch providers for the remainder of its constellation.
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Future Kuiper satellites will ride on ULA's newer Vulcan Centaur
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rocket are any spaces are on EI six Blue Origins,
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New Glen, and even SpaceX's Falcon nine. Despite SpaceX being
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a direct competitor with its own Starlink Internet constellation, Amazon's
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Kiper satellites will operate at slightly higher altitudes than Starlink,
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with the fleet distributed across ninety eight orbital planes in
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three layers at altitudes of five hundred and ninety six
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hundred ten and six hundred thirty kilometers. This launch begins
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a new chapter not just for Amazon, but for the
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growing commercial space industry, as competition in the satellite internet
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market continues to heat up. Finally for today, in an
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exciting development for lunar exploration and cosmology, the Italian Space
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Agency has selected European company Blue Sky's Space to build
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a revolutionary satellite fleet that will orbit the Moon. The project,
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named Radio Luna, will be developed in partnership with OHB
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Italia and aims to use the unique radio environment of
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the lunar far side to detect signals from the early
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universe that are impossible to capture from Earth. The mission
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targets what astronomers call the dark Ages of the universe,
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the period before the first stars formed, when the cosmos
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was filled with neutral hydrogen gas. These ancient radio signals
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hold valuable information about the universe's earliest structure, but they're
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exceptionally faint and difficult to detect. Amid Earth's cacophony of
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human made radio interference. The far side of the Moon
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offers a perfect radio quiet zone, shielded from Earth's electromagnetic noise.
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If successful, Radio Luna's small satellite constellation could provide unprecedented
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insights into the universe's formative period, essentially creating a map
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of cosmic dawn. We are grateful to the Italian Space
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Agency for funding this activity with our project partner OHB
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Italia to explore novel ways of delivering exciting science, said
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Marcel Tesseigni, Blue Sky's co founder and CEO. He noted
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that the project aligns with broader international efforts to develop
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lunar infrastructure through programs like ESA Moonlight and NASA Artemis.
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What makes Radio Luna particularly innovative is its approach to
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spacecraft design. Rather than building expensive custom satellites, the network
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will utilize small cube SATs equipped with commercial off the
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shelf components. This strategy emphasizes simplicity and cost effectiveness, potentially
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creating a template for future scientific missions. Roberto Asseti, Managing
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director at OHB Italia, described the project as a challenge
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where scientific ambition meets engineering pragmatism, highlighting their pride and
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contributing to an observatory that could open new frontiers in
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our understanding of the early universe. While details on funding
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and launch timelines haven't been disclosed. Radio Luna represents an
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intriguing example of how the burgeoning lunar economy might support
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fundamental scientific research. By leveraging the unique properties of the
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lunar environment, these small satellite could help unlock some of
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the biggest mysteries about our cosmic origins, and that brings
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us to a close for this episode. What an incredible
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journey through space we've had today. From Lucy's close encounter
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with the oddly shaped asteroid Donald Johansson to the stunning
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possibility of a diamond layer deep within Mercury. We've explored
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the packed launch schedule ahead, with China sending taikonots to
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their space station, SpaceX's multiple missions, and Firefly preparing for
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their technology demonstration flight. We also learned about Amazon's Project
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Kuiper finally getting its launch date after several delays, with
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those first twenty seven Internet satellites ready to begin building
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their orbital constellation, and of course, the fascinating Radio Luna
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project that aims to use the Moon's far side as
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a quiet zone to listen for whispers from the universe's
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