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  2. Odd radio circle - Wikipedia

    en.wikipedia.org/wiki/Odd_radio_circle

    Image of Odd radio circle ORC J2103-6200 by the MeerKAT telescope superimposed on an optical image from the Dark Energy Survey (2022) [1] [2]. In astronomy, an odd radio circle (ORC) is a very large (over 50 thousand times the diameter of our Milky Way ~ 3 million light years) unexplained astronomical object that, at radio wavelengths, is highly circular and brighter along its edges. [3]

  3. List of unsolved problems in astronomy - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Since 2003, Jean-Pierre Luminet, et al., and other groups have suggested that the shape of the universe may be the Poincaré dodecahedral space. Is the shape unmeasurable, the Poincaré space, or another 3-manifold? Cosmic inflation: Is the theory of cosmic inflation in the very early universe correct? If so, what are the details of this epoch?

  4. Astronomical radio source - Wikipedia

    en.wikipedia.org/wiki/Astronomical_radio_source

    An astronomical radio source is an object in outer space that emits strong radio waves. Radio emission comes from a wide variety of sources. Radio emission comes from a wide variety of sources. Such objects are among the most extreme and energetic physical processes in the universe .

  5. Quasar - Wikipedia

    en.wikipedia.org/wiki/Quasar

    The objects emitted large amounts of radiation of many frequencies, but no source could be located optically, or in some cases only a faint and point-like object somewhat like a distant star. The spectral lines of these objects, which identify the chemical elements of which the object is composed, were also extremely strange and defied explanation.

  6. Microwave-Emitting Object Is a New Space Mystery EzumeImages - Getty Images "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links."

  7. Tunguska event - Wikipedia

    en.wikipedia.org/wiki/Tunguska_event

    Date: 30 June 1908; 116 years ago (): Time: 07:17: Location: Podkamennaya Tunguska River, Yeniseysk Governorate, Russian Empire: Coordinates: 1]: Cause: Probable meteor air burst of small asteroid or comet: Outcome: Flattened 2,150 km 2 (830 sq mi) of forest Devastation to local plants and animals: Deaths: Up to 3 possible [2]: Property damage: A few damaged buildings: The Tunguska event was a ...

  8. 15810 Arawn - Wikipedia

    en.wikipedia.org/wiki/15810_Arawn

    15810 Arawn (provisional designation 1994 JR 1) is a trans-Neptunian object (TNO) from the inner regions of the Kuiper belt, approximately 133 kilometres (83 mi) in diameter. It belongs to the plutinos , the most populous class of resonant TNOs .

  9. Massive compact halo object - Wikipedia

    en.wikipedia.org/wiki/Massive_compact_halo_object

    A MAssive Compact Halo Object (MACHO) is a kind of astronomical body that might explain the apparent presence of dark matter in galactic halos. A MACHO is a body that emits little or no radiation and drifts through interstellar space unassociated with any planetary system (and may or may not be composed of normal baryonic matter ).

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