Navy Capt. Victor Glover is one of the few humans who can speak from experience about the effects of long-term space habitation on the human body and mind.
In 1962, aboard the Friendship 7 spacecraft, John Glenn made history by becoming the first American to orbit Earth and kicked the U.S. space program into overdrive.
With helicopters on Mars, private crewed missions, robotic probes flying into the Sun's atmosphere, and Captain Kirk boldly going to the final frontier, 2021 was a bumper year in space exploration. Here's a look at the top stories in the Cosmos.