A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

The images offer the closest view yet of comet 3I/ATLAS, famous for being only the third known interstellar object to pass ...

The stunning photos of the interstellar object, 3I/ATLAS, were taken by the European Space Agency's Mars orbiters last week.

Astronomers have discovered fresh evidence suggesting the possible existence of an unseen planet in the far reaches of our solar system.

By combining the power of ground-based and space-based telescopes, astronomers have discovered a new brown dwarf—a type of ...

The concept of two black holes orbiting one another has been theorized for many years, but recent satellite photography may ...

In the hunt for extraterrestrial life, we usually look for planets orbiting sun-like stars and icy moons. But there is ...

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...

Planets do not emit visible light like stars; they shine in the sky because they reflect sunlight. Exoplanets too reflect starlight, and nobody does it better than LTT9779b. This world reflects 80 ...

The comet-like object Chiron has been caught in the process of forming new rings, which could help us understand how these ...

The rate of finding these distant worlds has recently increased, with astronomers scrambling to accommodate the data ...

The European Space Agency also hoped to observe the interstellar object during its close approach to Mars using two satellites, the Mars Express and the ExoMars Trace Gas Orbiter, while NASA hopes its ...