Read in-depth answer here. Besides, what evidence supports an acceleration in the expansion rate of the universe?
What evidence supports an acceleration in the expansion rate of the universe. the discovery that type 1a supernova in distance galaxies are 25 percent fainter than expected. What observational evidence supports the fact that our universe is expanding? Redshift of galaxies.
Subsequently, question is, what does it mean that the universe is expanding? When scientists talk about the expanding universe, they mean that it has been growing ever since its beginning with the Big Bang. In other words, the universe has no center; everything is moving away from everything else.
In this way, how fast is the universe expansion accelerating?
Wendy Freedman determined space to expand at 72 kilometers per second per megaparsec - roughly 3.3 million light years - meaning that for every 3.3 million light years further away from the earth you are, the matter where you are, is moving away from earth 72 kilometers a second faster.
Is the expansion of the universe speeding up slowing down or staying the same?
The most plausible explanation for the discrepancy is that the light from the supernovae, which exploded billions of years ago, traveled a greater distance than theorists had predicted. And this explanation, in turn, led to the conclusion that the expansion of the universe is actually speeding up, not slowing down.
