His favorite astronaut, his most beloved fictional space explorer, and the discoveries that would have changed the plot of 'The Martian.'
Oxygen-breathing critters might be more plausible than we thought.
Shower your friends with meteor facts.
We think you can, Opportunity.
Don't you want to meet them?
Heat and drills will help us probe for alien microbes
A look behind the scenes of NASA's advanced solar probe
A curved line marked the planet's surface for four days
Seeking a distant pale blue dot
Short answer: It depends who you ask
It's been 50 years since we got the first images of Mars. Now we're about to get the first images of Pluto.
Who knows what might be lurking on this weird, tiny space rock
This year's missions to the outer solar system are set to shake up the planetary family tree
It's called a conjunction, and it sure is pretty
The greatest hits of Earth's unmanned spacecraft
The upper atmosphere of Venus is surprisingly similar Earth.
More than a light Venusian breeze.
Till mid-February, early risers will see the first five-planet alignment in a decade
It's time to return to our hellish neighbor.