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surface of Mars

Life

The ethics issue: Should we colonise other planets?

As ever more potentially habitable exoplanets are discovered, it's time we asked ourselves: do we have the right to take over another world?

The moon's surface

Environment

Our young moon鈥檚 supersonic winds made waves in its magma ocean

An artist's impression of Planet Ten

Space

Weird orbits hint ‘Planet Ten’ might lurk at solar system edge

two maps of heat maps of twin plants side by side

Physics

Mistaken brown dwarf is actually two planets orbiting each other

Jupiter

Space

How Jupiter split the asteroid belt in two shows its great age

Space

Saturn鈥檚 moons could reassemble after a cosmic smash-up

Diagram of the shape of a synestia 鈥� like a red blood cell or a doughnut

Space

Huge impact could have smashed early Earth into a doughnut shape

Zircon mineral grains

Earth

Early Earth was covered in a global ocean and had no mountains

Protoplanetary disc around young star TW Hydrae.

Space

Earth may have been born in a huge flare-up of the young sun

Mars and asteroids

Space

Mars Trojans may be part of a planet that was destroyed long ago

Nine asteroids that trail the Red Planet contain a material usually only formed in the mantle of rocky planets

Earth

Rocks of ages: How meteorites reveal the solar system’s history

Space

Distant DeeDee could be a new dwarf planet

Physics

Mars is so small because Jupiter shook up its formation

Environment

NASA orbiter shows Mars lost 90 per cent of its CO2 to space