Space Exploration

NASA's Artemis moon program faces challenges the Apollo missions never did

The world’s richest man, Elon Musk, owes his superstar success to self-satisfied competitors who blew obvious opportunities

NASA flight engineer Matthew Dominick’s astrophotography helps us see our world—from space

The world’s first commercial space walk, performed by billionaire Jared Isaacman and SpaceX engineer Sarah Gillis, tested new technology and was practically flawless

The Europa Clipper spacecraft is only weeks away from lifting off on an epic voyage to one of the solar system’s most enigmatic and enticing moons

Astronauts may have the guts for space travel—but not the kidneys

Polaris Dawn’s astronauts will travel farther from Earth than anyone since the early 1970s and will attempt the world's first private spacewalk

Starliner’s first crewed test flight has concluded with a successful touchdown—and two astronauts still in orbit awaiting a different ride home

Wispy whorls on the moon’s surface are as lovely as they are strange. Scientists are starting to unravel their origins

Even Earth’s mightiest telescopes aren’t up to the task of imaging Apollo lunar landing sites. A lack of resolution is the biggest reason why

Butch Wilmore and Suni Williams launched to the International Space Station in June and expected eight days in space. Now these stranded astronauts finally have a ride home

The Polaris Dawn mission—a partnership between SpaceX and billionaire Jared Isaacman—will soar to historic heights and attempt the first-ever commercial spacewalk