Solar system

After 49 years in space, NASA’s Voyagers are running low on power—but an audacious move should extend the tenures of the two spacecraft

Strange whirlpools of plasma seen in the sharpest images ever captured of our star help explain the deep origins of Earth-threatening space weather and more

Lakes of liquid methane on Titan, Saturn’s largest moon, could offer exhilarating—and terrifying—opportunities for otherworldly surfing

Space agencies around the globe are coordinating missions to visit the asteroid Apophis during a close encounter with Earth in 2029

A private spacecraft launched to boost the decaying orbit of NASA’s Swift Observatory is now suffering from potentially mission-ending malfunctions

In searches for past and present Martian life, some scientists say we’ve been too cautious to see what’s right in front of us

Using the new Vera C. Rubin Observatory, astronomers are beginning the largest and deepest survey of the sky. What will they see?

Duration, location, aviation: What makes the best possible view of a total solar eclipse?

Solar eclipses are a rare and brief opportunity for scientists to gather data on everything from the physics of the sun to air pressure in the upper atmosphere

Other planets have moons, too. Do they get eclipses like we do?

The moon is Earth’s constant companion. But will that always be the case?

The evidence is mounting: this interstellar visitor is even older and weirder than anyone thought