An impression of Mars in the past, when it was watery and probably volcanic....

Kepler-444 A is an orange main-sequence star twice the age of the Sun, an incredible 11 billion years old. Orbiting this are two red dwarfs (center, right) and five known planets. All planets orbit so close to their parent star that life as we know i...

Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in the sky. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean epoch of the Earth's past, between 2.5-4 billion ye...

Between 4.1 and 3.8 billion years ago, the Solar System was in turmoil. Known as the Late Heavy Bombardment, the period was characterized by an enhanced rate of asteroid impacts in the inner Solar System - remnants from the planet building processes ...

Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in the sky through the clouds. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean Eon of the Earth's past, between...

This once normal star, having exhausted its internal supply of hydrogen, has expanded, growing into a gargantuan caricature of its former self called a red giant. It is dozens or hundreds of times its original size. Any nearby planets will be engulfe...

Illustration of a young terrestrial exoplanet around an M-dwarf star under intense asteroidal bombardment. Created for an Oxford University press release....

Illustration of a young terrestrial exoplanet around an M-dwarf star under intense asteroidal bombardment. Created for an Oxford University press release....

... tive. Geyser-like jets of water were seen venting from the moon's south-polar surface ices, produced by a process called cyrovolcanism ('cold volcanism'). ...