Solar system

The edge of the world is closer than you think, and simple geometry proves it

After an unexpected communications dropout, NASA’s Ingenuity helicopter is back in business on Mars

Japan’s SLIM precision-landing spacecraft—a potential game-changer for upcoming lunar exploration—may expire on the moon before fulfilling its mission

Astrobotic’s Peregrine lunar lander, which endured a crippling postlaunch malfunction for longer than expected, could set a precedent for a coming wave of U.S. moon missions

If successful, the Artemis program promises to revolutionize travel to other celestial bodies. But many more tests of hardware remain

The last time North Americans caught a total solar eclipse, the sun was in a lull of activity. This year’s eclipse will be very different

Peregrine will likely burn up in Earth’s atmosphere, the moon lander’s builder has said

Our planet’s precession is scarcely noticeable during anyone’s lifetime, but across history, it has had enormous effects

NASA’s Mars Sample Return program is the agency’s highest priority in planetary science, but projected multibillion-dollar overruns have some calling the plan a “dumpster fire”

Astrobotic’s Peregrine lander was meant to be the first commercial spacecraft to operate on the surface of the moon. Instead it may not reach lunar orbit at all

A new analysis finds that images from Voyager 2's close encounter with Neptune show the planet as being far too blue

Middle-aged stars hit cruise control, stifling their magnetic fields and resisting the slowdown that scientists expected