Citizen astronomers discover new planet that NASA algorithms missed
Keen eyes have located a new planet twice the size of Earth.
NASA’s InSight lander has arrived on Mars
It will study the planet’s interior for the first time.
Planet-hunting Kepler telescope declares that it is not, in fact, dead
The spacecraft may be critically low on fuel, but it's still fighting.
Scientists think these meteorite diamonds formed on a long-lost planet
Deposits embedded in the diamonds gave clues about the meteorite's origin.
When is a planet too big to be called a planet?
One scientist proposes changing the definition.
Trump's NASA nominee is willing to study climate change... on Mars
But Earth? Not so likely.
Mars rover's home crater was a potential hotbed for life
Curiosity's landing site was a warm lake for 700 million years.
Most habitable planets may be completely covered in water
Simulations suggest that Earth's ideal mix of land and sea is rare.
Nearby 'super-Earth' may be our best shot yet at finding alien life
LHS 1140b is in just the right orbit for atmospheric studies.