These images capture the drama of the early universe billions of years ago-glittering galaxies, shining stars exploding into supernovae, and blazing jets launched from black holes.
In a series of studies published on Wednesday, the European giant LOFAR radio telescope detected thousands of stars born in distant galaxies with unprecedented accuracy.
By using a technique corresponding to a very long exposure with a field of view about 300 times the size of a full moon, scientists were able to distinguish the Milky Way (such as the Milky Way) deep in the ancient universe.
“The light from these galaxies has traveled billions of years and reached Earth; this means that we have seen galaxies billions of years ago, when they were forming most of the stars,” British scientist Philip Best (Philip Best) ) Said. The University of Edinburgh led the in-depth investigation of the telescope in a press release.
The LOFAR telescope combines signals from a huge network of more than 70,000 antennas in countries/regions from Ireland to Poland, and links them through a high-speed optical fiber network.
They can observe very faint and low-energy light that is invisible to the human eye. The light is produced by ultra-high-energy particles traveling at close to the speed of light.
The researchers say this allows them to study supernova explosions, galaxy cluster collisions, and active black holes that accelerate these particles in impacts or jets.
By observing the same area of the sky over and over again and putting the data together to make a single very long exposure image, the scientists were able to detect the radio radiation from star explosions.
The farthest object is only one billion years old in the universe. Now it has a history of 13.8 billion years.
Astronomer Cyril Tasse of the Paris Observatory said: “When galaxies form stars, many stars explode at the same time, accelerating very high-energy particles, and the galaxy begins to radiate.” Published in Astronomy and Astrophysics “In a series of papers in the magazine.
About 3 billion years after the Big Bang, he said that young galaxies “are indeed fireworks” and have “peaks of star formation and black hole activity.”
The telescope focuses on the vast sky of the northern hemisphere, and its exposure time is 10 times longer than the exposure time used in the production of the first cosmic map in 2019.
Tas told AFP: “This can get better results, such as photos taken in the dark. The longer the exposure time, the more things you can distinguish.
The deep image is generated by combining signals from thousands of antennas of the telescope and combining more than 4PB of raw data (equivalent to approximately one million DVDs).
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