Astronomers have long wondered why planets orbiting two stars like the iconic Tatooine in Star Wars are so rare. You would ...

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

According to these calculations, Earth's total lifespan will be about 9.5 billion years.

Scientists have identified a rocky outer planet in a system where a gas giant was expected. The discovery challenges ...

Astronomers have long believed that planetary systems follow a familiar blueprint. Small rocky planets ...

Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous neighbors, possibly after much of the ...

Authorities suspect Carl Grillmair was shot by man arrested for carjacking, as friends mourn him as ‘irreplaceable’ ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

Astronomers have uncovered a planetary system that challenges conventional theories of planet formation. The system likely includes a rocky planet that formed beyond the orbits of its gaseous ...

6 planets will align in a 'planet parade' Saturday, Feb. 28, 2026, shortly after sunset. Here's which planets you might see and how to best view them.

White dwarfs are the dense, collapsed cores of dead stars, capable of ripping apart planets with overwhelming gravity and ...