At a meeting in San Francisco, thousands of researchers are pondering how they can influence President-elect Donald Trump's thinking on climate change.
After a career as a Marine pilot, Glenn was chosen as an astronaut. He was the third American in space, went on to have a successful career in politics and then returned to space on shuttle Discovery.
Searching for alien life is harder than you might think, because whatever is out there might be really odd. So leading astrobiologists are meeting to advise NASA on how to go about looking for it.
The space station has a bathroom. But a spacesuit, not so much.So far, astronauts have relied on diapers, but NASA calls that a "very temporary" fix. It is offering $30,000 for a better idea.
The James Webb Space Telescope is undergoing its final series of tests in NASA workshops. It's designed to take even grander images than the Hubble telescope. But deploying it will be a major feat.
When astronomers spot a new planet that's too far away to be seen in detail, they work with artists to depict it. Space artists say they have a lot of freedom, but have to be careful, too.