Astronauts are back on board the International Space Station after NASA issued an order to shelter in place and prepare for ...

NASA offers a simple way to see which stunning celestial image the Hubble Space Telescope captured on your birthday.

The Hubble Space Telescope has been used to study 25 hot Jupiters. It has helped to answer "questions important to our ...

Galaxy merger Arp-Madore 417-391 is on display in this new image captured by the Hubble Space Telescope's Advanced Camera for ...

Once dismissed as empty expanses between galaxies, cosmic voids are becoming one of the most promising tools for probing the ...

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common alien theories, explained. This voice experience is generated by AI. Learn ...

If you're looking for something to do Memorial Day weekend and into May, here's how to spot a band of stars comprising the ...

The Pentagon began releasing files related to unidentified anomalous phenomena — previously and more infamously known as unidentified flying objects, or UFOs. NBC News' Tom Costello breaks down what's ...

New government UFO files reveal Apollo 17 astronauts saw 'Fourth of July' like flashes and other strange phenomena during a ...

There are speckles, horns, and a series of colorful, glowing ridges. No, it's not an underwater creature — it's the latest breathtaking portrait of the Trifid Nebula, captured by the Hubble Space ...

NASA is celebrating the 36th anniversary of the Hubble Space Telescope in Earth’s orbit, sharing a new image of the Trifid Nebula, nicknamed the “Cosmic Sea Slug,” first revealed in 1997. The ...