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The Age of Interstellar Visitors
As astronomers get better at finding the comets and asteroids of other stars, they’ll learn more about the universe and our place in it.
Continents of the Underworld Come Into Focus
Giant blobs nestled deep in the Earth may influence everything from the structure of island chains to mass-extinction events.
Are Saturn’s Rings Really as Young as the Dinosaurs?
A surprisingly youthful estimate of the age of the rings has stirred a backlash.
Wandering Space Rocks Help Solve Mysteries of Planet Formation
After an interstellar asteroid shot past the sun, scientists realized that there’s probably a lot of itinerant rocks out there.
A Close Look at Newborn Planets Reveals Hints of Infant Moons
Astronomers have discovered a complex planetary system still swirling into existence.
As Planet Discoveries Pile Up, a Gap Appears in the Pattern
Astronomers are puzzling over a paucity of planets in the galaxy measuring between 1.5 and two times Earth’s size.
Black, Hot Ice May Be Nature’s Most Common Form of Water
A new experiment confirms the existence of “superionic ice,” a bizarre form of water that might comprise the bulk of giant icy planets throughout the universe.
The Scientist Who Cooks Up the Skies of Faraway Worlds
Astronomers will soon take their first glance at the atmosphere of a distant exoplanet. Sarah Hörst is writing the guidebook for these exoplanetary explorers, one that will reveal what a distinctive atmosphere says about the world underneath.
Asteroid Rate Jumped in Solar System’s Past
An analysis of lunar craters has found that we’ve been living in a relatively violent period in cosmic history.