What's the earliest the moon could have formed?

Astronomers are pretty sure they know where the moon came from. In the early solar system, a Mars-sized object dubbed Theia smashed into Earth. This cataclysmic collision knocked a huge mass of material into orbit, which ...

NASA's Lucy ready for 2024 mission milestones

After its successful first asteroid encounter in 2023, NASA's Lucy mission has its sights firmly set on its main targets, the never-before-explored Jupiter Trojan asteroids. In 2024, the Lucy spacecraft will transition from ...

NASA's Lucy spacecraft preparing for its first asteroid flyby

NASA's Lucy spacecraft is preparing for its first close-up look at an asteroid. On Nov. 1, it will fly by asteroid Dinkinesh and test its instruments in preparation for visits in the next decade to multiple Trojan asteroids ...

Does this exoplanet have a 'sibling' sharing the same orbit?

Using the Atacama Large Millimeter/submillimeter Array (ALMA), astronomers have found the possible "sibling" of a planet orbiting a distant star. The team has detected a cloud of debris that might be sharing this planet's ...

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