Noctilucent clouds, Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere — and all you need are your naked eyes.

Named Eos, the cloud of gas would appear huge in the night sky if visible to the naked eye and could shed light on solar system formation.

The first test images from the Vera C. Rubin Observatory in Chile showcase thousands of previously unknown asteroids and ...

The Lagoon Nebula, or Messier 8, is a swirling cloud of interstellar gas where stars are born, located some 5,200 light years away. It reaches its highest point in the night sky around midnight on ...

Scenes of nebulas in the Milky Way, a cluster of galaxies and thousands of new asteroids are a teaser of how the U.S.-funded ...

Even then, these mysterious clouds don't appear every night. Noctilucent clouds can often be seen in the western sky about half an hour – and up to 90 to 120 minutes – after the Sun sets.

Using the Australia Telescope Compact Array (ATCA), astronomers have performed large-scale radio observations of a ...

An invisible molecular cloud that could shed light on how stars and planets form has been detected surprisingly close to Earth. Named Eos after the Greek goddess of the dawn, the cloud of gas ...

A vast star-forming cloud of molecular hydrogen that is one of the largest single structures in the sky has been discovered hidden near the solar system.. The crescent-shaped cloud—which its ...

The molecular cloud was detected 300 light-years from Earth, closer than any other similar, star-forming clouds. Thomas Müller (HdA/MPIA)/Thavisha Dharmawardena (NYU) Sign up for CNN’s Wonder ...

'Space cloud' season is upon us. With a little luck, Brits might be able to spot spectacular noctilucent clouds in the evening sky. The rare night sky phenomenon is seasonal and becomes visible in ...