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Planetary Science & Exoplanets
Worlds near and far—atmospheres, habitability, and planetary formation.
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More than 6,000 exoplanets confirmed in the Milky Way, including rocky worlds
1+ hour, 13+ min ago (290+ words) More than 6,000 exoplanets have been confirmed in the Milky Way, including terrestrial worlds that may be composed mainly of rock and metal. The NASA Exoplanet Archive listed 6,366 confirmed planets as of September 11, 2026, along with thousands of additional candidates awaiting verification....
Before moon landing, astronauts learned geology in Arizona
1+ day, 20+ hour ago (81+ words) FLAGSTAFF, Ariz. (AP) — Before Neil Armstrong and Buzz Aldrin knew they would be the first to walk on the moon, they took crash courses in geology at the Grand Canyon and a nearby impact crater that is the most well-preserved…...
On 2 August 1971, near the end of Apollo 15’s final moonwalk, David Scott stood before a television camera holding a 1.32-kilogram geological hammer in one hand and a 30-gram falcon feather in the other. He released them together, and in the Moon’s near-vacuum they struck the dust simultaneously—dramatically demonstrating what Galileo had predicted nearly four centuries earlier.
1+ hour, 43+ min ago (503+ words) Apollo 15 turned a geological tool and a falcon feather into a televised demonstration of equal gravitational acceleration in the Moon’s near-vacuum....
New simulations suggest the moon formed just 5 hours after Earth slammed into protoplanet Theia
2+ hour, 49+ min ago (552+ words) Earth's moon may have formed far faster than scientists once believed, with new simulations suggesting it came together in as little as five hours after a catastrophic collision. That unexpectedly short timeline could reshape researchers' understanding of one of the…...
Astronomers Spotted a 'Bear' on Mars
8+ hour, 24+ min ago (186+ words) On 12 December 2022, an orbiter traveling 251 kilometers (156 miles) above the southern highlands of Mars photographed a hill....
A Cosmic Catastrophe May Have Turned Neptune’s Ancient Moons Inside Out
12+ hour, 42+ min ago (962+ words) In 1989, Voyager 2 discovered six previously unknown moons around Neptune. Five of them are tiny satellites that travel just beyond the planet’s main rings. Their small size and great distance from Earth have made them especially difficult to study in detail....
Is This the First Exomoon
2+ day, 15+ hour ago (1676+ words) For decades, astronomers have been looking for moons beyond our Solar System. Several exomoon candidates have been proposed, but none has become an unambiguous, confirmed example. In a recent SETI Live conversation, host Dr. Franck Marchis spoke with Universidad Diego…...
Scientists Forced Water Into a Bizarre New State of Matter That May Explain Uranus and Neptune’s Strange Mgnetic Fields
14+ hour, 9+ min ago (575+ words) What happens to water when the usual rules no longer seem to apply? Scientists have recreated extraordinary conditions in the lab, uncovering a state of matter that could be hiding deep inside distant planets. Scientists have created a bizarre type…...
Ryugu’s Hidden Chemistry Reveals How Space Rocks May Have Delivered Life’s Ingredients To Earth
14+ hour, 9+ min ago (723+ words) Ancient dust from asteroid Ryugu reveals how nitrogen-rich compounds may have formed and survived before reaching young planets. Tiny grains collected from asteroid Ryugu have revealed how nitrogen-rich compounds may have formed and survived in space before reaching young planets....