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  2. Universe - Wikipedia

    en.wikipedia.org/wiki/Universe

    Map of the observable universe with some of the notable astronomical objects known as of 2018. The scale of length increases exponentially toward the right. Celestial bodies are shown enlarged in size to be able to understand their shapes.

  3. Observable universe - Wikipedia

    en.wikipedia.org/wiki/Observable_universe

    The Universe Within 14 Billion Light Years – NASA Atlas of the Universe – Note, this map only gives a rough cosmographical estimate of the expected distribution of superclusters within the observable universe; very little actual mapping has been done beyond a distance of one billion light-years.

  4. Shape of the universe - Wikipedia

    en.wikipedia.org/wiki/Shape_of_the_universe

    In physical cosmology, the shape of the universe refers to both its local and global geometry. Local geometry is defined primarily by its curvature, while the global geometry is characterised by its topology (which itself is constrained by curvature). General relativity explains how spatial curvature (local geometry) is constrained by gravity.

  5. Chronology of the universe - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_the_universe

    e. The chronology of the universe describes the history and future of the universe according to Big Bang cosmology. Research published in 2015 estimates the earliest stages of the universe's existence as taking place 13.8 billion years ago, with an uncertainty of around 21 million years at the 68% confidence level.

  6. Cosmic microwave background - Wikipedia

    en.wikipedia.org/wiki/Cosmic_microwave_background

    The map suggests the universe is slightly older than researchers expected. According to the map, subtle fluctuations in temperature were imprinted on the deep sky when the cosmos was about 370 000 years old. The imprint reflects ripples that arose as early, in the existence of the universe, as the first nonillionth of a second.

  7. Milky Way - Wikipedia

    en.wikipedia.org/wiki/Milky_Way

    Map of stars cataloged by the Gaia release in 2021, displayed as density mesh in the diagram. The ESA spacecraft Gaia provides distance estimates by determining the parallax of a billion stars and is mapping the Milky Way with four planned releases of maps in 2016, 2018, 2021 and 2024. Data from Gaia has been described as "transformational".

  8. Big Bang - Wikipedia

    en.wikipedia.org/wiki/Big_Bang

    v. t. e. The Big Bang was the initiation of the continuing expansion of the universe from a state of high density and temperature ( its central singularity ). [1] It was first proposed as a physical theory in 1931 by Roman Catholic priest and physicist Georges Lemaître when he suggested the universe emerged from a "primeval atom".

  9. Evolutionary Map of the Universe - Wikipedia

    en.wikipedia.org/wiki/Evolutionary_Map_of_the...

    Evolutionary Map of the Universe, or EMU, is a large project which will use the new ASKAP telescope to make a census of radio sources in the sky. EMU is expected to detect about 70 million radio sources. [1] Most of these radio sources will be galaxies millions of light years away, many containing massive black holes, and some of the signals ...

  10. Wilkinson Microwave Anisotropy Probe - Wikipedia

    en.wikipedia.org/wiki/Wilkinson_Microwave...

    In the Lambda-CDM model of the universe, the age of the universe is 13.772 ± 0.059 billion years. The WMAP mission's determination of the age of the universe is to better than 1% precision. The current expansion rate of the universe is (see Hubble constant) 69.32 ± 0.80 km·s −1 ·Mpc −1.

  11. Planck (spacecraft) - Wikipedia

    en.wikipedia.org/wiki/Planck_(spacecraft)

    Planck. (spacecraft) Planck was a space observatory operated by the European Space Agency (ESA) from 2009 to 2013. It was an ambitious project that aimed to map the anisotropies of the cosmic microwave background (CMB) at microwave and infrared frequencies, with high sensitivity and angular resolution.