Video preview of Tim Peake’s spacewalk

The NICER telescope array aboard the International Space Station has made the most accurate measurements yet of a pulsar’s mass and size.

NASA astronaut Terry Virts captured this stunning image of the United Kingdom, Ireland and Scandinavia on a moonlit night beneath an amazing curtain of aurora.

Next to the Moon and Venus, the International Space Station (ISS) can be the third brightest object in the nighttime sky. During the first ten days of August, the ISS is well placed for viewing before midnight for observers in the British Isles. We show you how, when and where to see it.