PARIS: The images capture dramas billions of years ago in the early universe – bright galaxies, bright stars exploding into supernovae and flaming jets fired from black holes.
European giant radio telescope LOFAR has discovered stars born in tens of thousands of distant galaxies with unprecedented precision, in a series of studies released Wednesday.
Using techniques that correspond to very long exposures and with a field of view approximately 300 times larger than a full moon, scientists have been able to distinguish galaxies like the Milky Way deep in the ancient universe.
“The light of these galaxies travels billions of years to reach Earth; that means we see galaxies as they were billions of years ago, when they formed most of their stars, ”said Philip Best of the British University of Edinburgh, who led a detailed study of the telescope in a press release.
The LOFAR telescope combines signals from a vast network of more than 70,000 individual antennas in countries from Ireland to Poland, connected by a high-speed optical network.
They are able to observe very weak and low-energy light, invisible to the human eye, created by ultra-energy particles that travel close to the speed of light.
The researchers said this allows them to study supernova star explosions, clusters of galaxy clusters and active black holes, which accelerate these particles in bumps or jets.
By observing the same celestial regions over and over again and putting together data to create a unique long-lasting image, scientists have been able to discover the radio brightness of exploding stars.
The most distant objects discovered were from the time when the universe was only a billion years old. It is now about 13.8 billion years old.
Published at dawn, April 8, 2021