Jupiter’s Biggest Moons Started as Tiny Grains of Hail

A new model offers an explanation for how the Galilean satellites formed around the solar system’s…

A Black Hole’s Boomerangs

Astronomers dissect the energy flow in a distant galaxy. Click here for original story,…

How NASA’s Future Rovers Might Escape Alien Sand Traps

A choreography of swimming, walking and rolling could help future rovers avoid getting stuck in loose…

This NASA Mission May Cause an Artificial Meteor Shower

A study says the DART mission’s collision with an asteroid near Earth may liberate enough debris…

How to See Comet SWAN in Night Skies

Fresh from the outer solar system, the cosmos offers us a show that’s trailing a 10…

SpaceX Changes to Starlink Satellites Earn Astronomers’ Praise

Some astronomers who have criticized the company’s orbital internet constellation were encouraged by the measures it…

Deep in the Cosmic Forest, a Black Hole Goldilocks Might Like

Astronomers found an intermediate black hole — not too big, not too small — that sheds…

Risky Business? NASA and Tom Cruise Talk Movie Plans

The head of NASA said the agency is working with the “Mission: Impossible” star on a…

Eta Aquarids: Watch Halley’s Comet’s Meteor Shower Peak in Night Skies

Meteor showers can light up night skies from dusk to dawn, and if you’re lucky you…

Antarctica vs. Science

For researchers using delicate, one-of-a-kind equipment, the extreme conditions at the bottom of the planet pose…