We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

The planets in order from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. If you include the ...

Life outside the Earth is one of the biggest "what if" in history, but NASA is trying to put a end to the discussion - or add ...

The sun will eventually become a red giant, engulfing Earth in about 5 billion years. More solar energy hits Earth in one ...

What methods can be used to identify subsurface oceans on the five largest moons of Uranus: Ariel, Umbriel, Titania and ...

NASA's James Webb Space Telescope detection of TWA 7b represents a major milestone: the lightest exoplanet discovered with a direct image.

A play structure in Ceres' Independence Park is believed to have been intentionally lit on fire, according to authorities.

Astronomers confirm TOI-5573 b, a rare, miniature Saturn-like planet orbiting a small star, challenging theories of planetary formation.

Ceres rotation Animation shows the rotation of the Ceres dwarf planet in the middle of the asteroid belt ...

This new dwarf planet may exist at the edge of the solar system, possibly disproving Planet Nine's existence. This is the story of that newly encountered planet.