WATCH: SpaceX's Polaris Dawn crew completes first private spacewalk

Jared Isaacman, CEO of Shift4 integrated payment processing solutions, participated in the first ever private spacewalk by a group of astronauts who left a SpaceX capsule after a delay of a few hours, testing a new line of spacesuits in the company's riskiest mission yet.

A record number of human beings are now in orbit

For the first time, there are 19 human beings orbiting the planet. They represent three different countries and are aboard three different spacecraft.

Polaris Dawn live updates: SpaceX launches 4 private astronauts for historic spacewalk mission Tuesday morning

SpaceX's Falcon 9 rocket lifted off at 5:23 a.m. ET carrying four Polaris Dawn mission private astronauts to low-Earth orbit from Launch Complex 39A at NASA’s Kennedy Space Center in Florida on Tuesday morning.

Geomagnetic storm watch issued, could produce auroras visible in US

The strongest impacts are expected to arrive on Tuesday, which could produce aurora lights father away from Earth’s poles, including in parts of the U.S.

Boeing's Starliner spacecraft returns to Earth without astronauts

The troubled Boeing Starliner spacecraft parachuted into the New Mexico desert overnight, without the astronauts it carried to the International Space Station in early June.

NASA astronaut stuck in space reports ‘strange noises’ coming from troubled Starliner capsule

A NASA astronaut at the International Space Station (ISS) on Saturday reported hearing a "strange noise" coming from the Boeing Starliner spacecraft just days before it is set to leave the station and return to Earth on autopilot.

Watch: Massive fireball wows onlookers in four states

A massive fireball stunned onlookers as it streaked across four states. Scientists are now on the hunt for pieces that may have fallen to the ground.

Who is the youngest person in space? Depends who you ask

Blue Origin has launched the oldest person, the youngest person and now the youngest woman into space – at least by their metric.

Boeing's troubled Starliner capsule will return to Earth as early as next week, without crew: NASA

NASA and Boeing said an uncrewed Starliner capsule will undock from the International Space Station and return to Earth no earlier than Friday, Sept. 6, “pending weather and operational readiness."

SpaceX grounded by FAA after Falcon 9 topples, burns on landing barge

The FAA has grounded SpaceX after a Falcon 9 booster toppled and burned during landing on a barge. This incident has halted upcoming launches and sparked an urgent investigation into what went wrong.

Here's when NASA's Starliner astronauts will finally come home – and how

NASA says it's not safe enough to let Butch Wilmore and Suni Williams fly the new Starliner spacecraft back to Earth, so they'll come home aboard a SpaceX Dragon capsule next year. Meanwhile, Boeing will suffer the ignominy of being bailed out by a rival.

Miss Monday's supermoon? When you can see it again

Monday's supermoon appeared 14% larger and 30% brighter, but more supermoons are on the way.

Polaris Dawn crew arrives in Florida ahead of first SpaceX spacewalk mission

SpaceX is preparing to launch two of its employees and two other private citizens on the company's most ambitious mission yet, including the first private spacewalk and sending humans into the deepest orbit since the Apollo program. 

Don't miss the rare Blue Supermoon rising Monday

Also known as the Sturgeon Moon, the eighth full moon of the year promises a rare and breathtaking celestial sight.