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

The timing of Earth's early formation points to a planet that started out dry. So, life’s essential building blocks arrived ...

At the time, astronomer Jerry Ehman spotted the highly unusual outburst in printed out records, annotating the major radio ...

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

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

Astronomers found that interstellar object 3I/ATLAS shows an "extreme abundance ratio" of nickel and iron in its gas plume.

A comet traveling outside the solar system and heading toward the Earth is much larger than scientists first believed, a ...

According to NASA, today (3 October) is actually the day when it's going to come 'closest' to Mars, though closest in this case is still 18.6 million miles, which is a really long way.

The asteroid belt may seem permanent, but it is far from static. Its slow decline reveals a more violent past when more ...

An interstellar comet, 3I/ATLAS, is speeding through our solar system in 2025, marking only the third such visitor. Traveling ...