When did the lights first come on in the universe? ESA C. In this way, the ability to detect emission lines in distant galaxies allows us to pinpoint at what stage in cosmic history we are seeing them. Facts matter. The Big Bang produced a cosmos that was filled with hydrogen, helium, and a small amount of lithium. Risinger, skysurvey.org ) Because the universe is expanding, the spectrum line associated with the oxygen was stretched out as it traveled through space in a process known as redshift .
Image credit : NRAO/AUI/NSF; S. Hot news! There are a number of ways the distance to JD1 can be found, but they all rely on the fact that the Universe is expanding . It's very strongly given off by gas that’s been warmed by luminous stars. And very interesting in another way. Their research, published on Wednesday, provides insight into star formation in perhaps the most distant galaxy ever observed.