Preview can do more than just show you a file in macOS, as it is especially handy for annotating images and editing PDFs.

The Necklace Nebula (PN G054.2-03.4) formed when one star in a close binary system expanded into a red giant and engulfed its ...

Astronomers may finally understand why planets orbiting two suns, the real-world equivalents of the "Star Wars" planet Tatooine, are so scarce in our galaxy — and it has to do with general relativity.

For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

General relativity helps explain the lack of planets around tight binary stars by driving orbital resonances that eject or destroy close-in worlds. This process naturally creates a “desert” of ...

Unlike a total solar eclipse, where the Sun is fully blocked, an annular eclipse leaves a thin circle of sunlight shining throughout the event.

ATC doesn’t do anniversaries for the sake of nostalgia. The launch of the EL50 Anniversary is a reminder of why the UK ...

New details emerge about the UFC White House event, including South Lawn capacity limits, fight card size, and disputes involving Jon Jones, Conor McGregor, and Dana White.

The next major eclipse expected to draw large global audiences will be a total solar eclipse on August 12, 2026.

Coach has taken part in Survivor four times, which has taught him the power of intuitive eating, breathwork, and meditation.

The UFC is holding a cage match to celebrate America’s 250th birthday (or maybe Trump). Here’s what we know about plans, ...