Scientists found a mysterious rogue planet roaming aimlessly outside our solar system. What if it came closer?

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Officially named 3I/ATLAS, the comet was confirmed as having originated outside of Earth's solar system on July 3, according ...

Astronomers are meticulously tracking the new interstellar visitor that is crossing our solar system. Officially designated ...

Imagine waking up one morning to the news: a black hole is drifting close to our solar system. It sounds like the plot of a .

A possible dwarf planet, like Pluto, has been observed in our solar system, according to a preprint published in arXiv. The area of space where this planet was found was previously thought empty.

The burst was so bright that it bounced off the Moon and illuminated Earth’s upper atmosphere, surpassing the brightness of a ...

A fluffy, Jupiter-sized planet may be triggering deadly flares from its star, leading to the slow destruction of its own ...

A meteor shower, a planet sighting, and a full moon. Here's how to see all of space's eye-catching activity in July.

NASA has since confirmed the object is an interstellar comet called 3I/ATLAS – and it is only the third interstellar object ...

Earth" that is located about 154 light-years away and is nearly twice as big and four times as massive as our planet.