Celebrate the 50th anniversary of NASA's groundbreaking Apollo program — and the 20th anniversary of Space.com — with a set of three free posters!

"Children of Ruin" probes alien minds of terrestrial and extraterrestrial origin.

NASA's Apollo program was transformational technologically, scientifically and politically, and it reverberates today in how the country sees itself and its accomplishments.

Just a month into a new observing round after significant improvements, gravitational-wave detectors have already used ripples in space-time to pinpoint five collisions of cosmic proportions.

As the forces of the universe muster against the ultimate villain Thanos for "Avengers: Endgame" (2019), Space.com took a look back at how the MCU has related to outer space.

In "Delta-v" (Dutton, 2019) by Daniel Suarez, out today (April 23), an unpredictable billionaire recruits an adventurous cave diver to join the first-ever effort to mine an asteroid.

SpaceX's upcoming cargo launch is still on track after a recent anomaly during a test of their Crew Dragon capsule.

Look up: It's the Lyrid meteor shower!

A new documentary April 15 from Science Channel follows SpaceIL's Beresheet mission, the Israeli moon lander that failed and crashed into the lunar surface.

A year on the space station has an undeniable impact across the human body, but many of the body's systems recover after a return to Earth.

Canadian astronaut David Saint-Jacques snapped a photo of a Russian cargo spacecraft's zigzag launch trail from the International Space Station this morning (April 4).

India's recent anti-satellite test created 60 pieces of orbital debris big enough to track, 24 of which rise higher than the International Space Station's orbit around Earth.

Germany's Zweibrücken Observatory bears a striking resemblance to a beloved "Star Wars" sidekick.

NASA Administrator Jim Bridenstine said that speeding up production of NASA's Space Launch System (SLS) megarocket is absolutely essential to getting humans to the moon by 2024.

Put yourself at the center of an ever-changing Milky Way with this new immersive video of the galaxy's core.

The most dangerous thing in space exploration is the humans that do the exploring — right up until it isn't.

A supernova explosion flung out a super-dense, whirling stellar core, sending it streaking across space at almost 2.5 million miles per hour with a glowing trail 13 light-years long in its wake.

SpaceX's first tests of its prototype Starship may start soon — and you can watch them live online.

An ethereal track by Queen lead guitarist Brian May accompanies the awe-inspiring time-lapse view from NASA's New Horizons flyby of a distant solar system object.