Sarah Lewin

NASA's Cassini spacecraft dove between Saturn and its rings yesterday (April 26), snapping the closest-ever views of Saturn's atmosphere.

Meet "Steve," a strange, new aurora feature discovered by citizen scientists and verified by the European Space Agency's (ESA) Swarm satellites.

This supernova was ready for its close-up — times four!

Jupiter is famous for its Great Red Spot, a storm twice the diameter of Earth that rages on the gas giant's surface. Now, researchers have found that it has a second great spot, almost as large.

For the first time, researchers have detected an atmosphere around a planet just a little bit larger than Earth outside the solar system.

Winston Churchill was known for his leadership during World War II, but a newfound essay on alien life reveals another side of him, one that was deeply curious about the universe.

Monster black holes shooting jets of gamma-ray radiation right at us have been spotted farther away than ever before, dating back to when the universe was nearly one-tenth its current age.

Last night (Sept. 25), SpaceX's Raptor interplanetary transport engine fired for the first time, according to a series of tweets from the company's CEO, Elon Musk.

This morning (Sept. 12), Jeff Bezos announced a new family of massive reusable rockets in development for his company Blue Origin. The rockets will be designed to launch both satellites and humans.

A new, comprehensive atlas of worldwide light pollution reveals that one-third of all people cannot see the Milky Way in the sky, including nearly 80 percent of North Americans.

The Milky Way's youngest supernova was probably caused by the collision of two ultradense remnants of stars, new research suggests.

A simple laser beam could disrupt aliens' observations of Earth, making it look like there's nobody home on the third rock from the sun, a new study suggests.

This eerie portrait of Mars' moon Phobos in ultraviolet light was snapped by the NASA orbiter MAVEN as their orbits crossed paths.