galactic

The Andromeda galaxy, which may have been growing by cannibalizing smaller galaxies.

Galactic cannibal Andromeda feasts on smaller galaxies, reveal cosmic remnants

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Andromeda, the Milky Way’s neighboring spiral galaxy, may be a cosmic cannibal that grew by swallowing smaller galaxies. Astronomers came to this conclusion by observing a globular cluster of stars called the Dulais Structure, named after the Welsh term meaning “dark stream”, which now dwells in Andromeda but seems to come from outside galaxy. The …

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How huge galactic black holes become the brightest objects in the universe

How huge galactic black holes become the brightest objects in the universe

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Some black holes release enormous, extremely bright jets of high-energy particles into space – yes, black holes, the epitome of darkness, cause some of the brightest lights in space. Specifically, some gigantic black holes around which most galaxies are built. While many of these galactic black holes are relatively docile, like the one at the …

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Our closest galactic neighbor indulges in 'cannibalism' again and again, study finds

Our closest galactic neighbor indulges in ‘cannibalism’ again and again, study finds

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There is growing evidence that galaxies grow by merging with other galaxies. Telescopes like Hubble have captured dozens of interacting galaxies, including well-known galaxies like Arp 248. The Andromeda Galaxy is the closest large galaxy to the Milky Way, and a new study shows that our neighbor consumed other galaxies at two separate times. “A …

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Our closest galactic neighbor indulges in 'cannibalism' again and again, study finds

Our closest galactic neighbor indulges in ‘cannibalism’ again and again, study finds

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There is growing evidence that galaxies grow by merging with other galaxies. Telescopes like Hubble have captured dozens of interacting galaxies, including well-known galaxies like Arp 248. The Andromeda Galaxy is the closest large galaxy to the Milky Way, and a new study shows that our neighbor consumed other galaxies at two separate times. “A …

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IceCube Lab in Twilight

‘Ghost’ particles detected emanating from galactic neighbor with gigantic black hole

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The IceCube Lab sits atop a billion-ton network of ice and detection equipment at the South Pole. Using the Powerful Neutrino Telescope, researchers have identified a new source of astrophysical neutrinos from the galaxy NGC 1068. Credit: Martin Wolf, IceCube/NSF On Earth, billions of subatomic particles called neutrinos pass through our bodies every second, but …

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