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Asteroids, Comets and Planetary Defense
Asteroids, Comets and Planetary Defense in Space Science: the news, the names and what changed.
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Latest in Asteroids, Comets and Planetary Defense
A giant crater may reveal the origin of Mars’ doomed moon
1+ day, 5+ hour ago (923+ words) A massive crater on Mars’ moon Phobos may hide a dense region of compressed material that could reveal whether the moon is a captured asteroid or debris from an ancient impact on Mars. Japan’s upcoming MMX sample return mission could…...
In 1724, a Meteorite Fell in Germany. Scientists Found It Contained a Material “Impossible” Under Known Physics
1+ day, 17+ hour ago (422+ words) Researchers found that a material hidden inside a centuries-old meteorite acts like neither crystal nor glass. A chunk of rock that fell from space in 1724 has spent three centuries in a Paris museum. Researchers have now used it to confirm…...
Stars that Brushed Past the Solar System [12:44]
2+ day, 37+ min ago (60+ words) 0:00 Proximity of Stars 1:28 110 AU Range 5:00 HD 7977's Oort Cloud Disruption 10:08 Scholz's Star Stars that Brushed Past the Solar System | 12:44 Territory | 122K subscribers | 408,226 views | August 8, 2026 Or by mail to: Free Republic, LLC - PO Box 9771 - Fresno, CA 93794 Thank you very much and God…...
5.5-billion-year-old meteorite reveals molecules tied to life
2+ day, 22+ hour ago (557+ words) Scientists have taken an unusually detailed look at the organic chemistry preserved inside two meteorites, revealing tens of thousands of carbon-based molecules and, for the first time in this study, images showing the structures of individual molecules. Meteorites can act…...
'Doomsday Asteroid' is closest space rock since dinosaurs amid NASA warning - AOL
2+ week, 2+ day ago (508+ words) An asteroid with the potential to trigger a catastrophic event will pass Earth at an alarmingly close distance, prompting NASA to classify the space rock as "hazardous". The asteroid, named Apophis after the ancient Egyptian god of chaos and destruction,…...
A Mars-Sized Planet Crashed Into Earth 4.5 Billion Years Ago, and Scientists Now Think the Moon May Have Emerged Within Hours
2+ day, 23+ hour ago (629+ words) The Moon’s creation story may need a rewrite. Researchers have uncovered new evidence suggesting that the aftermath of the ancient impact was more surprising than previously believed. The Moon may have formed almost immediately after the giant collision that shaped…...
Astronomers Watched Two Planets Smashing Into Each Other 11,000 Light-Years Away
3+ day, 7+ hour ago (499+ words) A violent collision between two young planets offers clues to Earth's own chaotic origin story....
Google Maps Led to a 390-Million-Year-Old Impact Structure
3+ day, 7+ hour ago (704+ words) An amateur spotted a circular depression in Quebec on satellite maps. Fieldwork found shatter cones and impact-melt rock inside the 25-kilometre Uhackatik structure. What if a shape noticed while planning a camping trip turned out to be the scar of…...
Huge impact crater in Quebec went unnoticed for 390 million years
3+ day, 23+ hour ago (759+ words) A huge 390-million-year-old impact crater in Quebec was spotted by an amateur astronomer while planning a camping trip. Today’s Image of the Day from the European Space Agency takes us to a remote corner of Quebec, where a huge scar…...