Giant elliptical galaxies, the oldest known large galactic structures in the universe, have no spiral arms and little or no current star formation activity, but their central supermassive black holes are often active galactic ...
Astronomy
Aug 21, 2020
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102
An international collaboration bringing together over 200 scientists from 13 countries has shown that the very high-energy gamma-ray emissions from quasars, galaxies with a highly energetic nucleus, are not concentrated in ...
Astronomy
Jun 17, 2020
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253
Many galaxies far more active than the Milky Way have enormous twin jets of radio waves extending far into intergalactic space. Normally these go in opposite directions, coming from a massive black hole at the centre of the ...
Astronomy
May 8, 2020
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2211
The neutrino event IceCube 170922A, detected at the IceCube Neutrino Observatory at the South Pole, appears to originate from the distant active galaxy TXS 0506+056, at a light travel distance of 3.8 billion light years. ...
Astronomy
Oct 2, 2019
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918
An international team of astrophysicists observed for the first time that the jet of a quasar is less powerful on long radio wavelengths than earlier predicted. This discovery gives new insights in the evolution of quasar ...
Astronomy
Mar 19, 2019
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91
Fancy a cup of cosmic tea? This one isn't as calming as the ones on Earth. In a galaxy hosting a structure nicknamed the "Teacup," a galactic storm is raging.
Astronomy
Mar 15, 2019
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Hidden in a distant galaxy cluster collision are wisps of gas resembling the starship Enterprise—an iconic spaceship from the "Star Trek" franchise.
Astronomy
Nov 16, 2018
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109
Astronomers have detected radio jets emitted by a neutron star with a strong magnetic field—something not predicted by current theory, according to a new study published in Nature today.
Astronomy
Sep 26, 2018
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104
The longest known highly collimated structures in the universe are the narrow jets that emanate from the vicinity of powerful black holes in certain types of galactic nuclei. These narrow beams, often in pairs propagating ...
Astronomy
Jun 8, 2015
188
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Western Australia astronomers have discovered a radio galaxy near Earth by accident. The previously unknown radio galaxy is considered quite close to Earth, and was discovered late last year.
Astronomy
May 23, 2014
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