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.

Proxima Centauri b is the closest known exoplanet to our solar system that is thought to be within the habitable zone of its star.

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

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

Astronomers have spotted centimeter-sized “pebbles” swirling around two infant stars 450 light-years away, revealing the raw ...

Neptune is called an “ice giant” because it’s mostly made of a thick, slushy mix of water, methane, and ammonia, which ...

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

It has been suggested that the most likely planet in our solar system for humans to try to terra-form (make Earth-like) is ...

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

This is how our own solar system began forming around 4.5 billion years ago. The pebbles were found in planet-forming zones ...

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

Mount Everest may be the tallest mountain on Earth, but it's nothing compared to the towering giants scattered across our ...