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  2. Messier 100 - Wikipedia

    en.wikipedia.org/wiki/Messier_100

    Messier 100 (also known as NGC 4321 or the Mirror Galaxy) is a grand design intermediate spiral galaxy in the southern part of the mildly northern Coma Berenices. [5] It is one of the brightest and largest galaxies in the Virgo Cluster and is approximately 55 million light-years [ 3 ] from our galaxy , about 166,000 light-years in diameter.

  3. Lists of astronomical objects - Wikipedia

    en.wikipedia.org/wiki/Lists_of_astronomical_objects

    Lists of galaxies. List of galaxies; List of largest galaxies; List of galaxies with richest globular cluster systems; List of nearest galaxies; List of galaxies named after people

  4. Messier 22 - Wikipedia

    en.wikipedia.org/wiki/Messier_22

    M22 is one of only four globulars of our galaxy [c] known to contain a planetary nebula (an expanding, glowing gas swell from a massive star, often a red giant). It was an object first noted of interest using the IRAS satellite by Fred Gillett and his associates in 1986, as a pointlike light source [ d ] [ 16 ] and its nature was found in 1989 ...

  5. Milky Way - Wikipedia

    en.wikipedia.org/wiki/Milky_Way

    The Milky Way [c] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.

  6. Galactic Center - Wikipedia

    en.wikipedia.org/wiki/Galactic_Center

    The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. [ 1 ] [ 2 ] Its central massive object is a supermassive black hole of about 4 million solar masses , which is called Sagittarius A* , [ 3 ] [ 4 ] [ 5 ] a compact radio source which is almost exactly at the galactic rotational ...

  7. Location of Earth - Wikipedia

    en.wikipedia.org/wiki/Location_of_Earth

    Milky Way Galaxy: 30,000 pc 9.26×10 17: Our home galaxy, composed of 200 billion to 400 billion stars and filled with the interstellar medium. [36] [37] Milky Way subgroup: 840,500 pc 2.59×10 19: The Milky Way and those satellite dwarf galaxies gravitationally bound to it. Examples include the Sagittarius Dwarf, the Ursa Minor Dwarf and the ...

  8. List of the most distant astronomical objects - Wikipedia

    en.wikipedia.org/wiki/List_of_the_most_distant...

    Since the beginning of the James Webb Space Telescope's (JWST) science operations in June 2022, numerous distant galaxies far beyond what could be seen by the Hubble Space Telescope (z = 11) have been discovered thanks to the JWST's capability of seeing far into the infrared.

  9. Oort constants - Wikipedia

    en.wikipedia.org/wiki/Oort_constants

    Figure 1: Geometry of the Oort constants derivation, with a field star close to the Sun in the midplane of the Galaxy. Consider a star in the midplane of the Galactic disk with Galactic longitude at a distance from the Sun. Assume that both the star and the Sun have circular orbits around the center of the Galaxy at radii of and from the Galactic Center and rotational velocities of and ...

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