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Starliner: How will the astronauts return to Earth? NASA faces a tough dilemma

Suni Williams and Barry Wilmore were supposed to stay on the ISS for only one week, but they have now spent three months in space

Boeing’s Starliner: Astronauts stranded on the International Space Station, NASA says they can return

The mission was supposed to last eight days

A second Earth has been spotted by NASA scientists but it is 40 light years away

The exoplanet, called "Gliese 12b", is slightly smaller than Earth and could be habitable

Which animals will be the first to live on the moon and Mars?

Spaceborne animals could help humans survive on the moon or Mars. But which creatures would be the best for astronauts?

World’s first commercial spaceplane in final stages before debut ISS flight (video)

The Dream Chaser has been in development since its announcement in September 2004, and was initially set to be part of NASA's Commercial Crew program, shuttling astronauts to the ISS and back

Boeing’s crewed Starliner launches Monday and here’s why it’s a big deal (video)

To put it mildly, when Starliner makes its first attempt at launching on May 6, a lot more than the two astronauts aboard will be banking on its success

Former NASA engineer says he’s invented a thruster that doesn’t require propellant

But, we have some questions...

Voyager 1 sends back data for the first time in 5 months

Despite ongoing data analysis, initial observations indicate Voyager 1 is functioning well

NASA figured out why its Voyager 1 probe has been glitching for months

Corrupted memory hardware is causing the mission to transmit gibberish, but there may be a way to fix it

Cosmic explosion will be visible to the naked eye in once-in-a-lifetime stargazing event

The event, known as a nova, will be so bright that a “new” star will seem to appear in the night sky temporarily, visible to the naked eye

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