Measurements of Universe may be wrong

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  • March 6, 2020 at 4:40 pm #111973
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    Universe:https://www.independent.co.uk/life-style/gadgets-and-tech/news/universe-measurements-hubble-constant-dark-energy-stars-a9379751.html

    Our fundamental measurements of the universe could be wrong, scientists say

    The amount of dark energy and the rate of the universe’s expansion could have been miscalculated

    Our measurements of some of the most fundamental processes in the universe could be wrong, according to new research.

    Astronomers have found that what we thought we knew about the chemical measurements of stars could be mistaken. Since those stars have been used to track the history of the universe as it expands, our measurement of fundamental processes such as the Hubble constant and the amount of dark matter could be wrong too, scientists have said.

    The new findings come from a team of astronomers led by Maria Bergemann from the Max-Planck-Institute for Astronomy. They measured the chemical make-up of stars and came upon unexpected results.

    Astronomers had previously believed that a specific kind of supernova – known as “type Ia” – usually came about when a white dwarf orbited around a normal star and pulled away its outer layers. However, new measurements show that they largely come from other scenarios.

    That, in turn, suggests that we may be wrong in our understanding of how bright such stars can be, how the brightness changes over time, and how long they can stay bright. In the other kinds of explosions, the brightness is not as neatly constrained, and so we cannot know as definitively how bright a star should appear… see link

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