Planetary Science

Our sun is on a long, strange trip to its eventual demise. Here are the key stops along the way

The planet’s “wrinkles” give scientists a clue into how the world is contracting in size

NASA’s newest major observatory will include the most advanced planet-imaging tech ever flown in space. Here’s how it works

The Red Planet’s global geography of low-lying northern plains and rugged southern highlands seems to have surprisingly deep roots, with profound implications for Mars’s ancient habitability

On the 20th anniversary of Pluto’s infamous demotion, Mike “Pluto Killer” Brown explains why any reversal of that decision would be driven more by nostalgia than science

Claiming an exoplanet to be “Earth-like” is a trend that needs to bite the dust

The country’s latest mission, Chang’e 7, will be the first ever to land directly at the moon’s south pole. Whatever it finds there could radically reshape a new space race

Five common microorganisms found on Earth could survive at the lunar south pole, a new study finds, presenting a contamination risk for future human missions

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

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

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