NASA

NASA kicked off a critical countdown test Friday for its new moon rocket, a 30-story behemoth that could make its first lunar test flight by summer.

Pluto could have a far more viscous interior than previously thought after scientists say giant dome-like formations on the space rock’s surface were once recently active cryovolcanoes or icy volcanoes.

“There are many more planets in our galaxy we haven't found yet, as many as 100 to 200 billion. It's mind-blowing,” the lead scientist said.

SpaceX's Crew-4 will launch to the International Space Station (ISS) in April aboard a Dragon capsule named "Freedom." 

U.S. astronaut and Fairfax County native Mark Vande Hei has made it through nearly a year in space, but faces what could be his trickiest assignment yet: riding a Russian capsule back to Earth in the midst of deepening tensions between the countries.

Before any performance, whether a school play or a Broadway production, there is a dress rehearsal – usually many rehearsals – before opening night. The same goes for NASA's new moon rocket.

NASA has shared an image depicting what researchers say is the first observation of a debris cloud from a massive celestial collision.

As NASA’s giant moon rocket rolls to the launch pad for the first time, some pieces of space shuttle history are riding along with it. The SLS rocket’s engines and boosters powered each of the shuttles through the years, all the way back to Columbia.

NASA’s James Webb Space Telescope captured a mesmerizing image of the cosmos with a very bright star at its center and a couple dozen galaxies and additional stars surrounding it.

Preparations are underway in Florida as NASA plans to roll out the Space Launch System, its 322-foot-tall moon rocket, to the launchpad for the first time this week.

NASA will let you send your name on a flight around the Moon and back.