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  2. Outer space - Wikipedia

    en.wikipedia.org/wiki/Outer_space

    The baseline temperature of outer space, as set by the background ... It is the space between the stars or stellar systems within a nebula or galaxy. [132 ...

  3. Cosmic background radiation - Wikipedia

    en.wikipedia.org/wiki/Cosmic_background_radiation

    Temperature of the cosmic background radiation spectrum based on COBE data: uncorrected (top); corrected for the dipole term due to our peculiar velocity (middle); corrected additionally for contributions from our galaxy (bottom). Cosmic background radiation is electromagnetic radiation that fills all space.

  4. Cosmic noise - Wikipedia

    en.wikipedia.org/wiki/Cosmic_noise

    Cosmic microwave background radiation (CMBR) from outer space is also a form of cosmic noise. CMBR is thought to be a relic of the Big Bang, and pervades the space almost homogeneously over the entire celestial sphere. The bandwidth of the CMBR is wide, though the peak is in the microwave range.

  5. Portal:Outer space - Wikipedia

    en.wikipedia.org/wiki/Portal:Outer_space

    Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities , constituting a near-perfect vacuum of predominantly hydrogen and helium plasma , permeated by electromagnetic radiation , cosmic rays , neutrinos , magnetic fields and dust .

  6. Cosmic Background Explorer - Wikipedia

    en.wikipedia.org/wiki/Cosmic_Background_Explorer

    The Cosmic Background Explorer (COBE / ˈ k oʊ b i / KOH-bee), also referred to as Explorer 66, was a NASA satellite dedicated to cosmology, which operated from 1989 to 1993.Its goals were to investigate the cosmic microwave background radiation (CMB or CMBR) of the universe and provide measurements that would help shape our understanding of the cosmos.

  7. List of largest cosmic structures - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_cosmic...

    This list includes superclusters, galaxy filaments and large quasar groups (LQGs). The structures are listed based on their longest dimension. This list refers only to coupling of matter with defined limits, and not the coupling of matter in general (such as, for example, the cosmic microwave background, which fills the entire universe). All ...

  8. Void (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Void_(astronomy)

    The simultaneous existence of the largest-known voids and galaxy clusters requires about 70% dark energy in the universe today, consistent with the latest data from the cosmic microwave background. [5] Voids act as bubbles in the universe that are sensitive to background cosmological changes.

  9. UHZ1 - Wikipedia

    en.wikipedia.org/wiki/UHZ1

    UHZ1 is a background galaxy containing a quasar. At a redshift of approximately 10.1, UHZ1 is at a distance of 13.2 billion light-years, seen when our universe was about 3 percent of its current age. [1] [2] This redshift made it the most distant, and therefore earliest known quasar in the observable universe as of 2023.