Using data from NASA’s retired InSight lander, two separate teams of researchers found evidence of a sluggish Martian mantle ...

The textbook picture of how planets form—serene, flat disks of cosmic dust—has just received a significant cosmic twist.

The morning sky boasts the two brightest planets. Jupiter rises soon after midnight and is well up in the south-southeast sky ...

JWST placed new limits on planets around Epsilon Eridani and demonstrated an improved technique for spotting faint signals.

Astronomers have, for the first time, detected a planet growing inside a cleared gap of a protoplanetary disk, confirming ...

Given just how big space is, the solar system seems like it shouldn't be too mysterious. But there are actually plenty of questions that took years to solve.

Scientists revealed Wednesday that Mars’ innermost core appears to be a solid hunk of metal just like Earth’s. The ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper belt.

An international team of astronomers has made the unexpected discovery of a new planet. Detected at an early stage of formation around a young Sun-like star, the planet is estimated to be about 5 ...

Scientists believe giant impacts – like the one depicted in this artist’s concept – occurred on Mars 4.5 billion years ago, ...

The Planet Hunters Astronomers have found about 200 planets orbiting other stars, and they say it’s only a matter of time before they discover another Earth ...

Test your knowledge with this short quiz about the cosmos, from planets to stars and beyond.