WASHINGTON (Reuters) -Scientists are tracking a large gas planet experiencing quite a quandary as it orbits extremely close ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

For years, scientists have been scanning the icy outskirts of our Solar System for an unknown massive planet. The ...

NASA has discovered 3I/ATLAS, only the third known interstellar object, now passing through our solar system from the ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from ...

Though 3I/ATLAS will never come close to Earth, its passage offers a rare chance to study material beyond our solar system with ground-based and orbital telescopes, before it accelerates back into ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain life.

The Owl Nebula is an example of a planetary nebula — a type of object that yields glimpses of stellar death in slow motion.

That means returning from the moon, the Artemis astronauts will be traveling at around 0.0037% the speed of light. Assuming a ...

Using infrared imaging data collected by the two satellites over a 10-year period from 2015 to 2025, the team estimated ...

Despite being known as the Red Planet, Mars shows off its swirling yellows, oranges and browns in a new satellite photo from ...