Moon’s magnetic field lasted twice as long as we thought it did
Lunar rock shows the moon’s magnetic field lasted a billion years longer than we thought, which may help us understand how planets keep their protective fields
Nuclear reactors on rockets may fuel future crewed trips to Mars
NASA’s push to develop a rocket engine powered by a nuclear reactor could create a faster, lighter spaceship and cut the trip to Mars down to four months
Giant loner asteroids suggest baby planets formed quickly
The oldest intact asteroids hint that planets didn’t grow by slowly gathering small space rocks, but came from rapidly collapsing dust
First exomoon might have been spotted 4000 light years away
Astronomers may have found the first exomoon around a distant planet, and have asked to use Hubble to confirm whether the tantalising hints are a real discovery
General relativity passes test at Milky Way’s central black hole
Stars orbiting the supermassive black hole have been used to test Einstein’s famous theory for the first time, with no sign found of a fifth fundamental force
Titan’s riverbeds show a terrain built more like Mars than Earth
Saturn’s largest moon resembles Earth with its rivers and mountains, but it came by its topography very differently - and could still be active today
Stars can start shining at a smaller mass than we thought
Objects with only 6.7 per cent of the sun’s mass can be stars, according to a fresh measurement of how massive an object must be to achieve nuclear fusion
Watch Cassini’s first two dives between Saturn and its rings
New video puts those stunning first images from the Cassini spacecraft's Grand Finale into context in Saturn's cloud tops
Marvel at the images from Cassini’s first Grand Finale orbit
The Cassini spacecraft is beginning its final set of daring orbits with breathtaking images of the Saturn system and rings
First look at images from Cassini’s dive between Saturn’s rings
These are the first images of the planet taken as the Cassini spacecraft made the first of its 22 planned dives between its rings.