December 21, the winter solstice, is called 'Big Day', marking the start of longer days, rooted in astronomy, tradition, and ...

The Ursids will peak around the time of the winter solstice under dark skies with chances of enhanced meteor activity.

Interstellar comet 3I/ATLAS will make its closest approach to Earth on Friday. New X-ray images could shed light on its ...

Sunspots AR3664 and AR3663 have been erupting with X- and M-class solar flares. Both sunspots are Earth-facing and could ...

After witnessing the array of Northern Lights as far south as Colorado, we discuss how Coronal Mass Ejections (CME) are ...

The most powerful telescope in history. The James Webb Space Telescope's "jewel-filled" photos are stunning. CNN legal ...

Dazzling 'dawn storms' that illuminate Jupiter's poles are 10x more intense than the gas giant's regular auroras.

Last month, European regulators grounded thousands of Airbus jetliners, citing an unusual reason: solar radiation. The planes ...

The Geminids are peaking this weekend. Amateurs and experts regard the dazzling celestial display as one of the year’s best meteor showers.

New images taken by the Hubble Space Telescope and a Jupiter-bound mission showcase interstellar comet 3I/ATLAS ahead of its close pass by Earth.

(CNN) — Astronomers have spotted the largest and most distant flare ever observed from a supermassive black hole. Nicknamed “Superman,” the flare originated 10 billion light-years from Earth, and at ...