Observations of the orbits of six small objects have led researchers to propose a very large 9th planet--100s of astronomical units (AU) away from the sun. Far enough away that this Neptune-sized planet takes ~15,000 years to complete one orbit.

After a long journey, the InSight spacecraft arrived at the Red Planet on November 26, 2018. Learn about the punishing entry, descent and landing sequence and what it takes to safely land on Mars.

A revised version of David Bowie's Space Oddity, recorded by Commander Chris Hadfield on board the International Space Station. With thanks to Emm Gryner, Joe Corcoran, Andrew Tidby and Evan Hadfield for all their hard work.

When Wylie Overstreet set up his telescope outside on a whim, he had no idea he would inspire awe in hundreds of strangers on the streets of Los Angeles, reminding them of their common humanity.

New video recorded during NASA’s Orion return through Earth’s atmosphere provides viewers a taste of what the vehicle endured as it returned through Earth’satmosphere during its Dec. 5, 2014 flight test. The video begins 10 minutes before Orion's 11:29 a.m. EST splashdown in the Pacific Ocean, just

US space agency NASA has warned that a huge 1,082 ft asteroid bigger than the Eiffel Tower will break into Earth’s orbit in just over a week.The space rock is heading our way and should skim past us on December 11. NASA has its eye on Asteroid 4660 Nereus because it’s well over 492 feet long and wil

Virgin Galactic’s VSS Unity, the reusable rocket-powered space plane carrying the company’s first crew of tourists to space, has successfully launched and landed.

Watch the launch of the James Webb Space Telescope—the most powerful space telescope ever made. This mission is scheduled to lift off at 7:20 a.m. EST (12:20 UTC), Dec. 25, 2021, aboard an Ariane 5 rocket from Europe’s Spaceport in French Guiana. With revolutionary technology, Webb will observe a pa

Astronomers are combing through fresh data from the James Webb Space Telescope in a never-ending quest to find ever-more-distant galaxies. However, the observatory is still studying a variety of objects, from insanely detailed images of Jupiter to the most distant known star.

An idea born in unsettled times becomes a feat of engineering excellence. The most complex machine ever built to bring humans to and from space and eventuall...