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    Dark energy tagged posts

    Scientists Precisely Measure Total Amount of Matter in the Universe

    September 29, 2020, Categories  Astronomy/Space

    The team determined that matter makes up about 31% of the total amount of matter and energy in the universe. Cosmologists believe about 20% of the total matter is made of regular — or “baryonic” matter — which includes stars, galaxies, atoms, and life, while about 80% is made of dark matter, whose mysterious nature is not yet known but may consist of some as-yet-undiscovered subatomic particle. (UCR/Mohamed Abdullah)

    A top goal in cosmology is to precisely measure the total amount of matter in the universe, a daunting exercise for even the most mathematically proficient. A team led by scientists at the University of California, Riverside, has now done just that

    Reporting in the Astrophysical Journal, the team determined that matter makes up 31% of the total amount of matter ...

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    Our universe: An expanding bubble in an extra dimension

    December 30, 2018, Categories  Astronomy/Space

    In their article, the scientists propose a new model with dark energy and our Universe riding on an expanding bubble in an extra dimension. The whole Universe is accommodated on the edge of this expanding bubble.
    Credit: Suvendu Giri

    Uppsala University researchers have devised a new model for the Universe – one that may solve the enigma of dark energy. Their new article, published in Physical Review Letters, proposes a new structural concept, including dark energy, for a universe that rides on an expanding bubble in an additional dimension.

    We have known for the past 20 years that the Universe is expanding at an ever accelerating rate. The explanation is the “dark energy” that permeates it throughout, pushing it to expand...

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    Hyper Suprime-Cam survey Maps Dark Matter in the universe

    September 27, 2018, Categories  Astronomy/Space

    The weak lensing surveys such as HSC prefer a slightly less clumpy Universe (left) than that predicted by Planck (right). The pictures show the slight but noticeable difference as expected from large computer simulations. Credit: Hyper Suprime-Cam Survey

    The weak lensing surveys such as HSC prefer a slightly less clumpy Universe (left) than that predicted by Planck (right). The pictures show the slight but noticeable difference as expected from large computer simulations.
    Credit: Hyper Suprime-Cam Survey

    An international group of researchers, including Carnegie Mellon University’s Rachel Mandelbaum, has released the deepest wide field map of the 3D distribution of matter in the universe ever made and increased the precision of constraints for dark energy with the Hyper Suprime-Cam survey (HSC).

    The present-day universe is a pretty lumpy place...

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    Could a Multiverse be Hospitable to Life?

    May 14, 2018, Categories  Astronomy/Space

    Artistic impression of a Multiverse -- where our Universe is only one of many. According to the research varying amounts of dark energy have little effect on star formation. This raises the prospect of life in other universes -- if the Multiverse exists. Credit: Image by Jaime Salcido/simulations by the EAGLE Collaboration

    Artistic impression of a Multiverse — where our Universe is only one of many. According to the research varying amounts of dark energy have little effect on star formation. This raises the prospect of life in other universes — if the Multiverse exists. Credit: Image by Jaime Salcido/simulations by the EAGLE Collaboration

    A Multiverse – where our Universe is only one of many – might not be as inhospitable to life as previously thought, according to new research. Questions about whether other universes might exist as part of a larger Multiverse, and if they could harbour life, are burning issues in modern cosmology...

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