An astrophysicist from Oxford has put forward a new theory that suggests that dark matter and dark energy are actually part of the same phenomenon: a “dark fluid” with negative mass that fills the universe.
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Gamma-ray bursts (GRBs) are the most energetic events in the universe, second only to the Big Bang itself. We don’t usually get any warning, but now astronomers have spotted the telltale signs of a star system that could blow its lid any moment – and it’s far too close to Earth for comfort.
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The galaxy W2246-0526 sits 12.4 billion light-years from Earth – almost the entire radius of the observable universe – and is the most luminous galaxy ever discovered, with the brightness of 350 trillion Suns. Now, astronomers have found that W2246-0526 is cannibalizing three neighboring galaxies.
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Astronomers have spotted a mysterious “ghost” galaxy orbiting the Milky Way. Huge but extremely faint, the oddball galaxy has been named Antlia 2, and it might just be weird enough to force us to rethink what we know about galactic physics and dark matter.
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Galaxies smash into each other on a pretty regular basis, usually merging together. Using data and observations from Hubble and the Keck Observatory, astronomers have now imaged the late stages of this incredibly slow process for the first time.
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Astronomers have discovered and mapped an enormous structure in the early universe with a mass the equivalent to one million billion times that of the Sun. The proto-supercluster, which has been named Hyperion after the Titan of Greek mythology, formed when the cosmos was only 2.3 billion years old.
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Astronomers have captured a striking view of the galaxy NGC 3981, which is revealed shining with the light of energetic stars, surrounded by its ghostly spiral arms. Located roughly 65 million light-years from Earth, it appears to have been disrupted by a close call with a neighboring galaxy.
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Astronomers have released one of the most comprehensive photos snapped by the Hubble Space Telescope, combining ultraviolet, infrared and visible light into one image that shows thousands of galaxies spread across space and time.
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The results of a new study suggest that a number of small satellite galaxies orbiting the Milky Way are actually some of the first to come into existence following the creation of the universe.
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An international team of astronomers has detected the most distant radio galaxy ever observed. By measuring the redshift of its light, the researchers determined that the object is about 12 billion light-years away, which dates it back to when the universe itself was just a kid.
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