Sentences with phrase «less bright galaxies»
It is further complicated by the fact that the brightest and easiest galaxies to observe — the most massive galaxies in the Universe — are rarer the further astronomers peer into the Universe's past, whilst the more numerous less bright galaxies are even more difficult to find.
https://www.sciencedaily.com/ Not exact matches
But recently, a survey has found several quasars — bright cores of galaxies, powered by matter falling into a supermassive black hole — that existed less than a billion years after the big bang.
Some researchers theorized that these afterglows eluded detection because they occurred in a less dense region of a galaxy, where ejected material wouldn't have the opportunity to interact with lots of particles and produce a bright enough burst.
The halos around quasars — the brightest and the most active objects in the universe, they are galaxies formed less than 2 billion years after the Big Bang; they have supermassive black holes in their centers and consume stars, gas, interstellar dust and other material at a very fast rate — are made of gas known as the intergalactic medium and extend for up to 300,000 light - years from the centers of the quasars.