Repost from @salyoursciencepal
This very distant quasar, artistically depicted by M.Kornmesser, is powered by a black hole with a mass 2 billion x that of the Sun. It's the brightest object yet discovered in the early Universe, observed as it was just 770 million years after the Big Bang. A “Lyman-alpha” emission line has a wavelength of 122 mm, corresponding to the energy (E) released when an electron (e-) transitions from a neutral hydrogen atom’s 2nd e- shell, which is farther from the nucleus and higher in E, to the 1st e- shell. Quasars emit Lyman-alpha lines, which travel through gas clouds with different redshifts. By detecting these "Lyman-alpha forests," astrophysicists can map quasars and galaxies in distant parts of the Universe and the "intergalactic medium" between them.
#space #farout #quasar #astrophysics #science #education #universe #europeansouthernobservatory#lovemycosmos#cosmos #einstein