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    redshifts of galaxies tagged posts

    New Light on Baryonic Matter and Gravity on Cosmic Scales

    March 26, 2021, Categories  Astronomy/Space

    The presence of ionized gas around galaxies with moves with them leaves a trace in the microwave background radiation (left panel) which can be detected knowing the pattern of velocities of the galaxies provided by the map of fluctuations in their redshift (right panel). Credit: Carlos Hernández-Monteagudo (IAC).
    The presence of ionized gas around galaxies with moves with them leaves a trace in the microwave background radiation which can be detected knowing the pattern of velocities of the galaxies provided by the map. Credit: Carlos Hernández-Monteagudo (IAC).

    Scientists estimate that dark matter and dark energy together are some 95% of the gravitational material in the universe while the remaining 5% is baryonic matter, which is the “normal” matter composing stars, planets and living beings. However, for decades, almost one-half of this matter has not been found. Now, using a new technique, a team including researchers from the Instituto de Astrofísica de Canarias (IAC) has shown that this “missing” baryonic matter fills the space between galaxies as hot, low-density gas...

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