Wed 28 Nov, 2018 06:10 pm - The chains and sheets of galaxies, and the voids between them, observed in the large-scale structure of the universe, were once thought to be inconsistent with the Big Bang Theory. Explain how... (view)
Wed 28 Nov, 2018 06:08 pm - When astronomers measure the abundance of atomic elements in what appear to be isolated and untouched parts of the universe, they always detect the same amounts of hydrogen and isotopes of helium... (view)
