Castel Gandolfo is also home to one of the Holy See’s more unexpected institutions: the Vatican Observatory, which since its ...

Shrouded by a swirl of gas and dust, a gas giant, roughly three to ten times the size of Jupiter, was found in a new exoplanet discovery.

Death Toll from Deadly Flooding Has Risen to 27 People.

New research is shedding light on what researchers call "lite" intermediate-mass black holes, which are smaller, but still important.

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, speeding through our celestial neighborhood.

Newfound interstellar object 3I/ATLAS may be carrying pristine material from early in the Milky Way’s star-forming history.

3I/ATLAS is only the third object of its kind ever observed, following the interstellar asteroid 1I/ʻOumuamua in 2017 and the interstellar comet 2I/Borisov in 2019.

Over the next few days, astronomers will pull together evidence to determine whether the object is a comet.

The newly discovered interstellar visitor is just the third of its kind and fascinates astronomers who hope to learn from it about galaxies far, far away.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed. The object -- likely a comet -- was first detected in data collected between by ...