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An explosion that may have destroyed a SpaceX Crew Dragon spacecraft during an engine test on April 20 could push back NASA's plans to begin launching astronauts from U.S. soil this summer.

Magnetic activity and surface flows at different scales pertub radial velocity measurements....

In 2018, a team of astronomers from the United States and Canada discovered that an ultra-diffuse galaxy called NGC 1052-DF2 (DF2 for short) contains virtually no dark matter. The galaxy is roughly the size of our Milky Way Galaxy, but hosts only 1/200 the number of stars. It lies in the constellation of Cetus, about [...]

Here's what the Earth looked like from the International Space Station during one of the 16 sunrises the astronauts experienced on Easter Sunday (April 21).

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Earth is one of thousands of planets known to date — but it's the only world we know of that hosts life, and that's worth celebrating.

A team of astronomers from the United Kingdom and Germany has spotted a superflare coming from an L-dwarf star approximately 250 light-years away that’s estimated to be 10 times more powerful than any such event emitted by the Sun. L-dwarf stars are among the lowest mass objects that could still be considered to be a [...]

On April 22, 2010, the U.S. Air Force launched the super-secret X-37B space plane on its first spaceflight. See how it happened in our On This Day in Space videos series!

On April 23, 1962, NASA launched the Ranger 4 mission to the moon. But then it went wrong. See how it happened in our On This Day in Space videos series!

Astronomers aren't sure how this galaxy ended up with its long, gassy appendages, but NASA's upcoming James Webb Space Telescope is going to investigate.