Universe isn’t growing as fast as thought: It is not sprinting as fast as Usain Bolt
Universe is not expanding as fast as previously thought. On the contrary, it is expanding at much slower pace. It is more like at snail pace than Usain Boltâ€™s sprinting.
Astronomers who were working on this aspect of the universe have said that the universe is expanding at very slow pace due to the fact that there is not so much dark energy present to propel it and make it faster.
Researchers associated with the University of Arizona are excited about the findings of the study. They are more excited due to the fact that they have broken a myth that might have made impediments in the way of further research on the topic.
Astronomers from the University of Arizona claim that their findings have raised questions about how fast the expansion of Universe has taken place since the Big Bang occurred 13.8 billion years ago. Researchers claim that the teamâ€™s “big cosmological questions” was ignited by a discovery that the type of supernovae commonly used to measure distances throughout the Universe wasn’t unvarying but actually falls into different categories.
There is no denying the fact that the study is going to be of immense help in the future. The cosmic distances were actually measured by astronomers using the Type Ia supernova. This category of supernovae creates regular peak luminosity due to the uniform mass of white dwarfs that explode via the accretion mechanism.
This actually allows these explosions to be used as “standard candles”, which is used to measure the distance to their host galaxies because the visual magnitude of the supernovae depends primarily on the distance.
While talking about the studyâ€™s findings Peter Milne of the University of Arizona said, â€œWe’re proposing that our data suggest there might be less dark energy than textbook knowledge, but we can’t put a number on itâ€¦Until our paper, the two populations of supernovae were treated as the same population. To get that final answer, you need to do all that work again, separately for the red and for the blue population.”
He went on to add that the conclusion by the researchers are analogous to sampling a selection of 100 watt light bulbs and discovering they varied in brightness. “We found that the differences are not random, but lead to separating Ia supernovae into two groups, where the group that is in the minority near us are in the majority at large distances – and thus when the universe was younger,” said Milne.