Space

Earth’s water may not all have come from asteroids © NASA

Earth’s water may not all have come from asteroids

If energy can't be created, where did it come from in the first place? © Getty Images

If energy can’t be created, where did it come from in the first place?

© nasa/jhuapl/swri/steve gribben

Surprises are in store for the New Horizons’ fly by

Are you smart enough to be an ISS astronaut? (Tim Peake © ESA/NASA)

Are you smart enough to be an ISS astronaut?

Space mining: the new goldrush © Getty Images

Space mining: the new goldrush

How fast are the Voyager spacecrafts travelling? © NASA

Mission timeline: Voyager’s landmark moments

Gravitational waves point to primordial black holes © Mark Garlick/Science Photo Library/Getty Images

Why 2019 is going to be a good year for gravitational waves

Ganymedem Jupiter’s moon shows signs of past tectonic activity © NASA

Ganymede, Jupiter’s largest moon, shows signs of past tectonic activity

Why didn't the Big Bang produce equal amounts of matter and antimatter? © Getty Images

Why didn’t the Big Bang produce equal amounts of matter and antimatter?

The Solar System’s top 20 moons ranked. Why? Because we can… © NASA

20 of the most amazing moons in the Solar System

Professor Stephen Hawking, British theoretical physicist. Photographed at the Centre for Mathematical Sciences, University of Cambridge © Eleanor Bentall/Corbis via Getty Images

Can you solve these deviously difficult Stephen Hawking-inspired questions?

Why does the Earth spin? © Getty Images

Why does the Earth spin?

InSight: what NASA's mission to Mars could find inside the Red Planet © NASA/JPL-Caltech

InSight: what NASA’s mission to Mars could find inside the Red Planet

Odd moves provide clues to exomoon’s presence © Dan Durda

Odd moves provide clues to exomoon’s presence