"Our work is calling for a complete revision for how we think about the potential for life on Mars."
The space agency was making preparations for the launch of its next-generation Space Launch System.
Venus's surface is an inhospitable wasteland. But its upper atmosphere is much like Earth.
Full alignment will be easier to see from the Southern Hemisphere—but people at Northern latitudes should still be able to spot Mars, Saturn and Jupiter.
A new study suggests that the Red Planet could have supported subsurface microbes.
The igloo would provide a long-term base for researchers to explore Mars and the solar system beyond.
Binoculars or a telescope might be necessary to see some of the planets.
Do you have a million-dollar idea to help astronauts turn gas into sugar in space?
It has a probe instrument attached to it called HP3.
Twitter users launch hashtags #WakeUpOppy and #SaveOppy after months of silence from the 15-year-old rover.
Musk's Mars ambitions have started to look more like fantasy.
Are we really going to toss aside all dreams of space colonization just to target Elon Musk with snide headlines?
It won't be visible everywhere—but there's a live stream for those who won't be able to see it in person.
These images are as close as any of us are getting to Mars any time soon—but they're beautiful enough to be a worthy consolation prize.
Is the briny sludge teeming with tiny organisms?
If it's anything like the lake beneath the ice of Antarctica, it might just harbor life.
The moon will come within four-moon diameters of Saturn in the night sky.