California's SpaceX company will take the unusual step of trying to land part of its Falcon rocket after it launches a cargo mission to the space station on Tuesday.

Astronomers prove they can accurately tell a star's age from how fast it spins, after measuring the spin speed of stars more than a billion years old.

The virus behind the common cold is much happier in a cold nose, US researchers show.

US company SpaceX has postponed an experiment to bring part of its Falcon rocket down to a soft landing on a floating sea platform.

The Hubble Space Telescope, which in 2015 completes 25 years in orbit, has gathered dramatic new views of two well-known celestial objects - the "Pillars of Creation" and the Andromeda Galaxy.