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Unusual formations in Mars' Arabia Terra region reveal the Red Planet's climate history.

SpaceX Starship Flight 14 is underway.

SpaceX's Starship megarocket reached orbit during a test launch today (Sept. 28), checking a very important box on the road to operational flight.

See stunning photos of September's Harvest Moon as it lights up skies around the world, delighting skywatchers from Hong Kong to San Francisco.

SpaceX will attempt to launch its Starship megarocket to orbit for the first time on Sept. 28. Here's what time Starship Flight 14 will launch.

Billions of years ago, something happened in our solar system that gave rise to one of the most peculiar planetary mysteries: What caused Uranus to spin on its side?

The UN's International Court of Justice could help stop the uncontrolled proliferation of satellites in Earth's orbit, which threatens to erase stars from the sky, astronomers hope.

SpaceX's Starship megarocket will attempt to go orbital for the first time ever on Monday morning (Sept. 28), and you can watch the historic action live.

On Sept. 27, 1997, NASA's Mars Pathfinder mission beamed its very last data transmission back to Earth. Here's why it mattered.

The findings also suggest that the material that gave birth to Bennu was representative of the average elemental content of the planet-forming disk that also formed Earth and the planets.