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Oort cloud

Space

The Oort cloud surrounds our solar system – why can't we see it?

It's a giant sphere of a trillion rocks encircling us that occasionally sends comets slinging our way. That's a convincing story – but we'd love some direct evidence

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Mercury in false colour, imaged by the Messenger probe

Space

Mercury once had a graphite crust floating on a sea of magma

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Space

ExoMars probe set to sniff out signs of life on the Red Planet

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Galactic collisions doom entire star systems to black-hole death

Space

Galactic collisions doom entire star systems to black-hole death

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Exclusive photos: Clouds seen on Pluto for first time

Space

Exclusive photos: Clouds seen on Pluto for first time

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cancer

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Cancer’s penicillin moment: Drugs that unleash the immune system

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Space

Summer on Titan may make its lakes ripple with waves

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Artist's impression of planet nine

Space

Planet Nine hunters enlist big bang telescopes and Saturn probe

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A couple cooking spaghetti in the kitchen

Life

Your immune system becomes like your partner's when you cohabit

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sun energy

Space

Space solar: The global race to tap the sun's energy from orbit

Solar panels in orbit could generate round-the-clock green energy and beam it down to Earth. Has the time for this epic feat of engineering come round at last?

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Space

Galactic GPS: How dead stars will guide us in deep space

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Space

Ancient maps of Jupiter's path show Babylonians' advanced maths

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Earth

How Planet Nine may have been exiled to solar system's edge

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Space

Solar system mysteries: What's inside Saturn?

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