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.

This is a good time to see the Milky Way, which is part of our own galaxy. Looking to the south from late evening ... In the pre-dawn sky, Saturn is in the south east and lower down in the east is ...

Ancient Greek astronomers were the first to gather knowledge about space exploration. Richard Branson and Jeff Bezos could ...

Space is a very big place, and as such, it's full of mysteries that scientists can't explain. Some of this is simply because it's impossible to fully observe, thanks to its sheer size and the ...

Already more than 4.5 billion years old, the sun is on course to run out of energy and die in another 5 billion years or so, but not before becoming so big it will engulf Mercury, Venus and ...

Past theories put a collision between the two—resulting in a new elliptical galaxy dubbed Milkomeda—as probable if not inevitable. Some predictions had that happening within 5 billion years ...

Asteroids around Venus, shown in the background above during a 2012 transit, are difficult to track because they fall inside Earth's orbit and are obscured by the sun's glare.

Both already collided with other galaxies in their ancient past and, according to many, seemed destined for a head-on crash. Past theories put a collision between the two — resulting in a new ...

While good news for the Milky Way galaxy, the latest forecast may be moot for humanity. "We likely won't live to see the benefit," lead author Till Sawala of the University of Helsinki said in an ...

(CNN) — A collision between our Milky Way galaxy and its largest neighbor, the Andromeda galaxy, predicted to occur in about 4.5 billion years, has been anticipated by astronomers since 1912.

Already more than 4.5 billion years old, the sun is on course to run out of energy and die in another 5 billion years or so, but not before becoming so big it will engulf Mercury, Venus and ...