Test how well you know the breakthroughs, pioneers, and turning points that shaped modern rocketry.
For over two centuries, we have watched the red giant R Leonis dim and brighten with regularity, but this 'heartbeat' is beginning to speed up near the end of the star's life.
Astronauts on the International Space Station were not only treated to a sight from Earth's atmosphere recently but also caught a glimpse of one of the Milky Way's nearest galactic neighbors.
The Canon 12x36 IS III binoculars are a great pair of image-stabilized optics that allow for shake-free observation of stars, nebulas and star clusters. They are now only $656 from Amazon.
Exploration advocates are pushing back against the planned cancellation of NASA's Mars sample return project, saying it could potentially find evidence of Red Planet life.
Scientists studying Jurassic rocks in China found that cyclical changes in Earth's orbit affected not only the climate, but also the development of shale oil reserves.
From the Upside Down through the Devil's Anus and beyond. Here are 6 times these theoretical wormholes turned up in sci-fi shows and movies.
"The surprise that a supposedly quiet, discless system could drive such a spectacular nebula was one of those rare 'wow' moments."
Astronomy needs space.
Iceberg A23-A has been around since the Chernobyl explosion and Space Shuttle Challenger accident...but perhaps not for much longer.