This graphic shows the emergence of a cosmic web in a cosmological simulation using general relativity. From left, 300,000 years after the Big Bang to right, a Universe similar to ours today. The dark ...
From there, scientists can rewind cosmic time, running the clock backward to estimate the universe's maximum age. Time begins for us at the moment of the Big Bang, when in a tiny fraction of a ...
As the Hubble tension can't be accounted for by either our best models of the universe or errors in Hubble measurements, an extra ingredient still seems to be needed in our cosmic recipe.
of the universe but with a density of hydrogen ions less than 100 per cubic meter. At temperatures between 100,000 and 10 million Kelvin, it is a web of "cosmic filaments" that are regions of hot ...