A meteorite from the Sahara holds the first direct… · Frontiers 🛰️
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🎧 Today's episode Episode 91 · A meteorite from the Sahara holds the first direct traces of a lost moon-size world that formed just after the solar system began. 2026-06-04 ▶ Listen now |
| 🚀 **Fascinating Frontiers** - Space & Astronomy News
> **A meteorite from the Sahara holds the first direct traces of a lost moon-size world that formed just after the solar system began.**
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### Top 15 Space & Astronomy Stories
1. **NASA Sets Roman Space Telescope Launch for August 30 — NASA**
The Nancy Grace Roman Space Telescope will lift off on August 30 aboard a SpaceX Falcon Heavy. The observatory will survey wide areas of the sky to study dark energy, exoplanets, and infrared astrophysics. A new blog will track mission milestones and share images during commissioning. Engineers have completed final instrument checks ahead of shipment to the launch site. Follow-up observations with Roman could refine measurements of cosmic expansion rates. Source: science.nasa.gov
2. **MAVEN Team Holds Livestream on Spacecraft Status — NASA**
NASA leaders discussed recent operations and science results from the MAVEN orbiter during a public livestream. The mission has tracked atmospheric loss at Mars for more than a decade. Data show how solar wind strips gases from the upper atmosphere over time. The update covered instrument health after years in orbit. Future reports will detail seasonal changes in the Martian exosphere. Source: youtube.com
3. **Starlink Group 17-47 Reaches Orbit from Vandenberg — Jonathan McDowell**
A Falcon 9 lifted off at 1540 UTC on June 3 carrying the latest batch of Starlink satellites. The launch originated from Vandenberg Space Force Base in California. Deployment occurred into a polar orbit to expand coverage over higher latitudes. This mission adds to the growing constellation serving global broadband needs. Additional launches are scheduled to maintain the network density. Source: x.com
4. **Falcon 9 Sends 29 Starlink Satellites from Florida — SpaceX**
SpaceX confirmed deployment of 24 satellites after the Florida launch, with five more expected to follow. The mission supports ongoing expansion of the low-Earth orbit network. Recovery of the first-stage booster was completed as planned. This flight marks another step in routine constellation replenishment. Operators will now verify satellite health and begin orbit-raising maneuvers. Source: twitter.com
5. **ExoMars Rover Site Contains Extensive Clay Deposits — European Space Agency**
New mapping shows clay layers at the Rosalind Franklin landing site extend farther than earlier estimates. The deposits suggest a large body of water once covered the region. Scientists believe these minerals could preserve organic molecules from ancient Mars. The rover’s drill will target these layers to search for chemical biosignatures. Orbital data from previous missions guided the refined landing ellipse. Source: esa.int
6. **Sahara Meteorite May Represent Lost Protoplanet — Space.com**
The fragment contains isotopic signatures unlike any known asteroid or planet. Researchers date its parent body to within a few million years of solar system formation. The meteorite likely originated from a differentiated world roughly the size of the Moon. Its mineral structure points to early melting and core formation. Further lab analysis will compare it with other primitive meteorites. Source: space.com
7. **Virgin Galactic Plans Study of Menstruation in Microgravity — El Paso Times**
The upcoming mission will collect physiological data from female crew members during suborbital flight. Researchers aim to understand fluid shifts and cycle management in weightlessness. Results could inform medical protocols for longer-duration space travel. The flight is described as a landmark effort in inclusive space medicine. Data collection will occur before, during, and after the brief weightless period. Source: Google News
8. **SpaceX Targets Record $75 Billion IPO — Phys.org**
The company values itself at $1.75 trillion ahead of the planned public offering. Proceeds would fund Starship development and additional satellite deployments. This would surpass previous largest debuts in market history. Investors are watching regulatory filings for final share pricing. The move could accelerate timelines for commercial Mars missions. Source: phys.org
9. **Jupiter Passes South of Pollux in Evening Sky — Astronomy Magazine**
The gas giant appears six degrees below the bright star after sunset on June 4. Observers in the Northern Hemisphere can spot both objects low in the west. The pairing offers a chance to compare Jupiter’s steady light with Pollux’s twinkle. No special equipment is required for the naked-eye view. The geometry repeats on predictable cycles tied to Jupiter’s orbit. Source: astronomy.com
10. **ESA Launches Updated Brand Identity — European Space Agency**
The redesign aligns with the agency’s Strategy 2040 goals for Earth observation, exploration, and security. New visuals emphasize space applications in daily European life. The change follows internal workshops with member states and industry partners. Updated logos will appear on future mission patches and public materials. Implementation begins immediately across all ESA communications. Source: esa.int
11. **Northrop Grumman Completes Artemis III Booster Segments — Northrop Grumman**
The final segments for the Space Launch System boosters have shipped to Kennedy Space Center. These components will help power the first crewed lunar landing under Artemis. Each segment contains solid propellant mixed and cast in Utah facilities. Integration with the core stage is the next major assembly step. The hardware supports NASA’s current return-to-the-Moon schedule. Source: Google News
12. **Record Ultramassive Black Hole Pair Found in Abell 402-BCG — r/astronomy**
The pair totals roughly 60 billion solar masses, the largest combined mass reported. A 3,200-light-year-wide cavity surrounds the system, cleared by gravitational interactions. The discovery came from deep imaging and dynamical modeling of the galaxy cluster. Future observations may detect gravitational waves from the eventual merger. The system offers a testbed for galaxy evolution models. Source: reddit.com
13. **Artemis II Crew Captures Moonlit View of Earth — NASA**
An astronaut photograph shows Earth illuminated by sunlight reflected from the lunar surface. The image was taken during the mission’s outbound leg toward the Moon. It highlights Earth’s thin atmosphere and ocean reflections against the darkness of space. The perspective underscores the spacecraft’s distance from home. Similar views will be collected on future Artemis flights. Source: science.nasa.gov
14. **Asteroid Regolith Behaves Fluffier Than Expected — Phys.org**
Drop-tower tests at the University of Duisburg-Essen showed planetary simulant material expands under low gravity. The experiments simulated conditions on small asteroids where self-gravity is weak. Results indicate surface material may be less compacted than models assumed. This affects predictions for spacecraft anchoring and sample collection. The paper appears on the arXiv preprint server. Source: phys.org
15. **Jupiter Helped Deliver Key Elements to Early Earth — Phys.org**
Iron meteorites and chondrites reveal phosphorus-to-nitrogen ratios shaped by Jupiter’s early migration. The planet’s gravity likely scattered volatile-rich bodies inward. This process delivered ingredients needed for Earth’s habitability. The study draws on samples analyzed at multiple laboratories. Models now incorporate these ratios to trace solar system chemistry. Source: phys.org
### Cosmic Spotlight A rare meteorite recovered from the Sahara contains chemical fingerprints that match no known asteroid or planet. Its oxygen and chromium isotopes point to a parent body that melted and differentiated within the first few million years after the solar system formed. Laboratory measurements show the fragment once sat inside a moon-sized world whose core and mantle separated before the object was destroyed. Researchers are now comparing the sample against other primitive meteorites to map where this lost world orbited. The find raises the question of how many such early bodies existed and why none survived intact. ### Cosmic Deep Dive: How Low Gravity Fluffs Asteroid Surfaces If Earth’s gravity were scaled down to that of a 10-kilometer asteroid, a person could jump off the surface and never return. On such tiny worlds the weak pull allows loose grains to sit almost weightless, so even gentle vibrations or micrometeorite impacts can make the top layer expand like foam. Experiments in a 100-meter drop tower showed that the same dry powder used to simulate asteroid dirt increased in volume by more than 30 percent once free-fall removed its weight. That extra fluff changes how a spacecraft footpad sinks or how a drill bit grips the surface. Yet no one has measured the exact porosity of the uppermost centimeters on any visited asteroid, leaving open the question of whether real surfaces are even lighter than the lab results suggest. Another day of steady progress across multiple missions and fresh clues from ancient rocks. |
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| Issue #91 · Fascinating Frontiers · Jun 4, 2026 |
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