The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.

Astronomers have discovered a remarkable planetary system where three very different objects orbit a distant star—and their ...

An interstellar comet changed its chemistry after passing the Sun, revealing hidden layers and a surprising mix of carbon ...

Some observers have questioned whether the general public is ready for the reality of what may be moving through our skies ...

Ridley Scott's eight-part sci-fi masterpiece has emerged as the perfect weekend binge before it returns for its sophomore ...

Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

Donald Trump announced his administration would begin identifying and releasing UFO-related information earlier this year.

Deep within massive rocky exoplanets, hidden oceans of molten rock may be generating powerful magnetic fields in an ...

The science fiction blockbuster wowed audiences with its depiction of space travel and more. Here's what NASA staff and other ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

For a long time, it was thought that this [technique] required telescopes in space,” says John Mather, the Nobel ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...