A quasar with a lookback time of 13 billion years is most likely to have the highest number of hydrogen absorption lines in its spectrum
Quasar is an abbreviation for quasi-stellar radio source. Quasars were given that name because, when they were initially discovered by astronomers in the late 1950s and early 1960s, they resembled stars. Quasars are not stars, though. They are young galaxies that are far away from us and are becoming more numerous as they approach the outer reaches of the visible cosmos, according to science. How are they still visible despite being so far away? Quasars are up to 1,000 times brighter than our Milky Way galaxy, which is the reason why they are so luminous. As a result, we are aware that they are extremely active and produce astounding amounts of radiation throughout the whole electromagnetic spectrum.
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