"Thanks for all your effort," wrote the first moonwalker. Neil Armstrong was appreciative, but as explained in his ...

The emblem art and first moonwalker's reply are part of the Clark C. McClelland collection, an archive of astronaut autographs, cscale rocket models and flown memorabilia from the estate of a NASA ...

Isro has completed crucial communications testing with the European Space Agency (ESA) for the Gaganyaan human spaceflight ...

Create a Physics World account to get access to all available digital issues of the monthly magazine. Your Physics World ...

Happy Valentine’s Day, readers! The lovely roses that many of you will give or receive today have likely traveled thousands of miles to make it to the US — from farms in South America, through customs ...

The two NASA astronauts who have been stuck at the International Space Station may be able to return to Earth sooner than expected. In a Tuesday press release, NASA said that SpaceX would switch ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. NASA on Tuesday ...

There it goes. OK. At the 3 hour and 50 minute mark of today's spacewalk, NASA astronauts Butch Wilmore and Sunny Williams successfully removed the radio frequency group off of the external ...