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.

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

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

The coming week will see the gas giant Saturn return to the Northern Hemisphere's late night sky, after spending the last few ...

SPHEREx is scanning the entire sky in 102 infrared colors, beaming weekly data to a public archive so scientists and citizen ...

Captured just days after its discovery, the images offer the clearest view yet of this rare visitor from beyond our solar system.

Recreating artificial solar eclipses in space could help astronomers decipher the inner workings of our sun much quicker than ...

The shortlist for Astronomy Photographer of the Year 2025 features 30 photographs selected from more than 5,800 global ...

NASA's Advanced Composite Solar Sail System (ACS3) will be visible from the ground. Find out when you can see it on the NASA ...

3I/ATLAS, also known as C/2025 N1, is a comet from interstellar space, meaning it originated in another star system and entered our solar system on a one-time flyby. It was first spotted by the ATLAS ...

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it ...

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