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An interview with the astrophysicist superstar.
The space probe heads to a more distant Kuiper Belt Object.
Re-analysed Moon rocks tell the story of a fiery youth.
The New York-based cosmologist is convinced the Universe is teeming with the life.
What causes a star to zoom across space and explode?
How do you detect dark energy when we don't know what it is?
When is putting human life at risk the right thing to do?
A tide of debris is cluttering space, threatening our satellites and rockets.
Who knew Pluto had mountains, glaciers and a smoggy haze?
A planetary system similar to our own has been located.
A look back at some of our most popular articles.
A distant galaxy has a freak black hole at its centre.
A human-sized centrifuge could counteract muscle wasting and bone loss in space
Astrophysicists detect one of the brightest and most enigmatic objects in the Universe.
Plutonium powers New Horizons' study of Pluto but our stocks are running low.
Have we finally glimpsed the first stars in the Universe?
Gases in the red planet's rocks could sustain Martian microbes.
The Large Hadron Collider is a giant time machine for physicists.
Shifting gravitational forces create chaos for the solar system's oddest orbits.
Coronal mass ejections from the Sun can wreak havoc on Earth.
The most popular stories from our news blog
Lab Talk: When galaxies collide.
NASA's New Horizons spacecraft is closing in on Pluto.
A new technique for studying distant worlds.
Water probably gave Mars its rusty look.
Tests on mice don't bode well for travellers to Mars.