What would allow a planet to host life? The habitable zone is often defined as the distance from a star where liquid water can exist on a planet's surface.
Once more, NASA leaves our sister planet out of the mix of new missions. Ouch.
The Red Planet has inspired a long history of brilliant mistakes.
Human history has always been linked to the influence of distant orbits, from climate change (past and present) to our exploration of the solar system.
It’s easy, but wrong, to take for granted a mission that’s still going strong after a decade.
A modest proposal: the golden spike that marked the beginning of the Anthropocene was the first lunar landing in Mare Tranquilitatis.
ISS astronauts are reviving our passion for space travel in novel ways.
We need to learn how to talk about possible signs of extraterrestrial intelligence.
Are we alone in the universe? Recent results don't support that conclusion, despite what the headlines say.
After a tremendously successful mission, Venus Express has orbited its last.
Musing on a long-lost Asimov gem.
An astrobiologist comes to grips with the new cosmology results.
Seeing Earth as a dot helps prepare us for the exoplanets.
We’re causing a mass extinction now. Can we prevent the next one?
A comet’s close passage to Mars reminds us of our own vulnerability.