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Artwork: Gaia is making the definitive map of our Milky Way Galaxy Europe’s Gaia space telescope has been used to clock the expansion rate of the Universe and - once again - it has produced some head-scratching. The reason? The speed is faster than what one would expect from measurements of the cosmos shortly after the Big Bang. Some other telescopes have found this same problem, too. But Gaia’s contribution is particularly significant because the precision of its observations is unprecedented. “It certainly ups the ante,” says Adam Riess from the Space Telescope Science Institute (STScI) and the Johns Hopkins University, both in Baltimore, Maryland, US. The inability to lock down a value for the expansion rate has far-reaching consequences - not least in how we gauge the cosmic timescale. If the Gaia speedometer is correct, it would mean having to reduce the estimated 13.88-billion-year age of the Universe by perhaps a few hundred million years. Read more:
What was there before the Big Bang? In this space and universe video documentary, we are going to take you through a journey where you can learn about the big bang, what caused the big bang and what was before the big bang. By watching this space and universe documentary, you can learn all about the big bang, big bang theory science, what was there before the big bang, what happened before the big bang, what existed before the big bang, etc.