Just decades after the first exoplanets were identified, our database of the distant worlds—monitored by the NASA Exoplanet Science Institute—has breached a new threshold. Now, astronomers have ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are added to the count on a rolling basis by scientists from around the world, ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density – given that the universe contains a lot of relatively empty space, could ...

"It shows that Makemake is not an inactive remnant of the outer solar system, but a dynamic body where methane ice is still evolving." ...

It's easy to think that Neptune is the coldest planet in the solar system because it is the farthest from the Sun. Astronomers have been puzzled for years by the fact that Uranus is the coldest planet ...

Ever since a mysterious interstellar object, since dubbed 3I/ATLAS, was first spotted screaming into our solar system this year, famed Harvard astrophysicist Avi Loeb has been raising the possibility ...

Federal funding is about to run out for 19 active space missions studying Earth's climate, exploring the Solar System, and probing mysteries of the Universe. This year's budget expires at the end of ...

Our sun has unexpectedly begun to ramp up its activity, which could lead to more severe solar storms that cause blackouts and disrupt global communications. NASA revealed that our solar system's home ...

Objects such as 'Oumuamua, Borisov and recently 3I/ATLAS have opened our eyes to the reality that outsiders regularly visit our solar system — and we're about to start spotting a whole lot more of ...