Planets

The rover has finally lost a pesky rock that had become lodged in its front left wheel "like a pebble in its shoe." The stone had accompanied the rover for more than half its time on the Red Planet.

Shortly after Mercury reached its closest point to the sun, its massive, comet-like tail became unusually visible in the night sky and was captured in a stunning new photo.

The spectacular Saturn-moon conjunction will happen just before sunrise in the east and can be seen from April 15 to 17.

Astronomers zoomed in on the dusty rings around Uranus in a new series of stunning James Webb Space Telescope images.

Researchers have mapped out at least 85,000 volcanoes on Venus' surface, and recent findings suggest that some of them are likely active.

Earth's magnetic field protects life on our blue planet — and astronomers just found evidence of a magnetic field on a rocky exoplanet 12 light-years away.

There's a huge difference between sending humans to Mars and colonizing worlds outside our solar system.

Scientists have observed that some of Neptune's Trojan asteroids are deep red, possibly revealing what asteroids may have been like in the early days of the solar system.

NASA's James Webb Space Telescope measured the temperature of the Earth-like planet TRAPPIST-1b and found that it is too hot for humans and likely has no atmosphere.

Watch live online as the dwarf planet Ceres swoops in front of the 'grand design' spiral galaxy Messier 100 this weekend.