Just a few smashups in the asteroid belt may account for 70 percent of Earth’s meteorites, limiting what’s known about our solar system’s history.
Launched October 14, the spacecraft will repeatedly buzz Europa in search of water, energy and organic compounds.
The Earth’s ambipolar electric field is weak but strong enough to control the shape and evolution of the upper atmosphere.
Images by the James Webb telescope of six Jupiter-sized worlds, one of which may have a moon-forming disk, reveal clues into how planets and stars form.
The discovery of 22,000 previously unseen moonquakes, plus a new idea of what causes them, could help us better prepare for trips there.
The NASA Mars rover examined a rock containing organic compounds and “leopard spots” that, on Earth, are associated with microbial life.
Rocky planets around fiery stars could hide their water for later use, but it takes 3 to 8 times the amount in our world’s oceans to end up Earthlike.
An analysis of images spanning hundreds of years suggests a dark spot spied in the late 1600s and early 1700s is distinct from the Red Spot seen today.
Hydrogen bonded with sulfur may have given our world its first water after the hydrogen broke away and joined with oxygen in the planet’s crust.
Data from NASA’s Magellan spacecraft suggest that volcanic activity is widespread on Venus.
