A newly released study of unusual asteroid orbits strengthens the case for the hypothesized distant, massive Planet Nine.

Editor’s note: This article on K2-18b was first published in September 2023 on The Conversation. The Times of London reported NASA’s James Webb Space Telescope was to further investigate the planet in ...

A newly released study of unusual asteroid orbits strengthens the case for the hypothesized distant, massive Planet Nine.

This pair of objects were the subject of a controversy that threatened to undermine our basic understanding of cosmic ...

If the JWST can see galaxies billions of light-years away, why can’t it find the proposed Planet X in our solar system?

The Moon moves down an early-morning line of planets while Eta Aquariid meteors streak through the sky this week.

PRIMA — the Probe far-infrared Mission for Astrophysics — is in the proposal stage, with hopes to be launched by the end of ...

Human spaceflight has long been a goal for SpaceX, the rocket and satellite manufacturing venture of billionaire Elon Musk.

The evening sky loses its last planet early in May, shifting the attention of planetary observers to the morning.

The long-delayed Starliner mission, if successful, will give NASA and future space tourists more options for getting to low ...

The spiders on Mars form during the planet's springtime when temperatures rise and rays of sunlight touch the ice layers of ...

Discovering new black holes is no easy feat — where do you even begin to look? New data and techniques help us get closer ...