Astronomers say a distant, sunlike star shows signs of a catastrophic planet-on-planet crash that may mirror the ancient impact that formed Earth's moon.

Earth’s gravity has a lot to do with what people think is up and what is down. Things fall down toward the ground, but that ...

The orbits of a seven-planet system discovered in Kepler Space Telescope data has been sonified. Credit: Bishop’s University ...

So, it came as a shock to many people when, in 1781, it was announced that a seventh planet, the first to be discovered since ...

NASA's DART mission didn’t just change the orbit of Dimorphos, the asteroid it hit. It changed the orbit of the larger ...

An oddly-behaving star led two UW astronomers to capture rare evidence of a collision between two planets in a distant solar ...

WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous ...

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

Six planets are set to align on Saturday, creating a planetary parade that will be visible to sky-gazers across the globe.

The NASA DART spacecraft shifted the orbits of two asteroids around the sun after intentionally crashing into one of them.

Want to catch a glimpse of the planetary alignment from Florida? Here's what to know, including a list of official dark sky locations in the state.

In late 2025 a mysterious comet flew between the orbits of Earth and Mars and reached a speed of more than 150,000 miles per ...