Solar System

The Argonaut moon lander one way the European Space Agency is getting involved in international lunar exploration endeavors.

Scientists measured a chorus wave emerging from an unexpected place, and confirmed a key piece of a theory about how these strange waves form.

Scheduled to launch on Feb. 27, NASA's PUNCH mission could revolutionize space weather forecasts, unify the solar corona and the heliosphere, and help improve astronomy techniques.

Stunning photos show bright comet lighting up the dark skies above ESO's Paranal Observatory, future home of the world's largest telescope.

The lunar canyons Vallis Schrödinger and Vallis Planck are extraordinarily deep, and scientists now know the valleys were carved by bullet-fast moon rocks.

Wrinkle ridges that formed in the past 160 million years suggest recent geological activity on the moon.

The next Sputnik Moment will take place against the backdrop of great power competition, as it did in the 1950s. This time, the top contenders are the U.S. and China.

There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and closed-loop systems and the hazards of space radiation.

For 366 days, six analog astronauts lived and worked in a sealed environment in Russia, an Earth-based stand-in for interplanetary missions of the future.