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

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For more than a century, astronomers have watched in astonishment as the Andromeda galaxy ignored the grand flow of cosmic ...

A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.

Most messages are press releases about astronomical discoveries—okay, scratch that; most of them are spam, but science announcements are an easy second place. But I also get questions from readers ...

Astronomers tracked a star that slowly faded instead of exploding. The quiet disappearance may reveal a hidden way black ...

They show up as a mathematical solution in general relativity, basically as a time-reversed version of a black hole. Some ...

All the “normal” matter, like the stars, gas, dust, and people, is called baryonic matter, and it’s basically the tiny visible fraction of a universe that’s mostly invisible and still not fully ...

In A Nutshell A massive star in the Andromeda Galaxy faded by more than 10,000 times over a decade and vanished from view, ...

Astronomers tracked a star in Andromeda as it dimmed and vanished without the usual fiery explosion, offering rare clues to ...

The Andromeda Galaxy, shown here with two of its satellite or companion galaxies, is one of few objects in the night sky visible with the unaided eye that's outside our own Milky Way Galaxy. And I do ...

The recent Andromeda update, the fastest and most advanced iteration to date of Meta’s ad-retrieval system, has dramatically changed the rhythm of Meta Ads. Delivery cycles are faster, creative gets ...