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.

Paul Wiegert, a Western physics and astronomy professor, shares insights on asteroid 2024 YR4 and the likelihood it will hit Earth or the Moon.

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

Dubbed 3I/ATLAS, it is blazing through our cosmic cul-de-sac at truly awe-inspiring speeds between the main asteroid belt and ...

There are currently no known asteroids on an impact course with the planet. Still, scientists are keeping a watchful eye on ...

When NASA’s DART spacecraft collided with a small asteroid moon in late 2022, the impact made history. It was the first ...

Ancient meteorite reveals a protoplanet formed in the outer Solar System earlier than thought, reshaping planet formation ...

The NASA-funded ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope in Rio Hurtado, Chile, first reported observations to the Minor Planet Center of comet 3I/ATLAS on July 1, 2025.

A groundbreaking study published in Communications Earth & Environment has called into question the long-standing assumptions ...

How did Earth, alone among the solar system's rocky planets, become the home for life? How, among all this frigid ...

A small, inconspicuous meteorite may be about to change our understanding of how and when our solar system formed. Tiny shavings from the meteorite Northwest Africa 12264 are challenging the long-held ...

CAPE CANAVERAL, Fla. (AP) — Astronomers say they've spotted an object in our solar system that's believed to be from another ...