An astronaut on the ISS photographed a "lunar halo" over the Indian Ocean, revealing ice and rare optical phenomena from ...

Depending on its position, the Sun passes its light through combinations of these materials to cast glowing patterns of ...

Astronomers using the NASA and European Space Agency’s Hubble Space Telescope have identified what appears to be a ...

Astronomers have signalled the discovery of a planetary body roaming the Milky Way that is not gravitationally bound to the ...

The interstellar comet 3I/ATLAS has just done something no confirmed visitor from another star system has ever been seen to do, lighting up in X-rays after developing a vast halo roughly 400,000 km ...

Astronomers analyzing data from an array of telescopes — including the W. M. Keck Observatory atop Mauna Kea on the Big Island — determined that luminous fast blue optical transients are powered by an ...

Residents in Portage la Prairie were treated to a striking winter sky the last few evenings as pillars of light shot up from ...

This deck of cirrocumulus clouds passing over Newport was stunning back on July 29. Typically, high and mid-level clouds make ...

Only a small fraction of the observable universe is comprised of visible matter. Current data suggests all galaxies are ...

KEY OBSERVATIONS The first alert came quietly. The data did not look wrong—just unfamiliar. What followed has forced ...

Something really unusual happened in Sweden recently, and people online couldn’t stop watching. Imagine scrolling through your feed and suddenly seeing a glowing halo around the sun. That’s exactly ...

The Hubble Telescope appears as a tiny silhouette during a perfectly timed solar transit captured from Puerto Rico.