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.

In our analysis this week, we look at how NASA's proposed budget would slash the agency's science division by nearly 50%.

For only the third time in recorded history, an interstellar object has crossed into our solar system, creating quite the ...

Astronomers have spotted a new interstellar object — the third of its kind ever seen — shooting towards us through the solar ...

The question of how life began has captivated humanity for millennia. Now, a team of scientists are preparing to use NASA's ...

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

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

Astronomers have discovered thousands of exoplanets, some in the so-called habitable zone, but does that mean they could host ...

Instead of a tempest in a teapot, imagine the cosmos in a canister. Scientists have performed experiments using nested, ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...