SpaceX is about to send its human spacecraft farther than ever before in space, and it will do it with a crew of four civilians. During the five-day Polaris Dawn mission, the Crew Dragon capsule is expected to reach its highest-ever orbit of 435 miles above Earth. That’s about 185 …

During a solar storm, the sun unleashes a torrent of radiation into space. If you’re on Earth, the planet’s atmosphere and magnetic field shield you against the most harmful health impacts. But if you were on Mars some 140 million miles away, how those gusts of energy would affect you …

After Butch Wilmore got settled into the commander seat of Starliner earlier this summer, he thanked the people preparing to blast him and his crewmate Suni Williams into space. “Outstanding. Nice job, guys,” the NASA astronaut said before a launch attempt that ultimately scrubbed. “We’ll see you in a couple …

Using images from a NASA telescope, three amateur scientists discovered a star-like object sprinting through space — so fast, in fact, it’ll whiz right out of the Milky Way. This freak of nature, traveling about 1 million mph, will escape the clutch of the galaxy. It’s the first time anyone …

Perhaps surprisingly, the majority of stars in the galaxy are not sun clones but smaller orbs of gas and plasma known as red dwarfs, about half the size of Earth’s star. Astronomers have had their sights set on these stars as tantalizing places to look for habitable worlds for a …

A pair of U.S. astronauts who test-piloted a new Boeing spaceship in June may not fly home on the craft they rode in on. While Boeing has conducted a variety of tests in space and on the ground to try to better understand problems with its Starliner capsule, now docked …