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  2. Andromeda Galaxy - Wikipedia

    en.wikipedia.org/wiki/Andromeda_Galaxy

    The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31 , M31 , and NGC 224 . Andromeda has a D 25 isophotal diameter of about 46.56 kiloparsecs (152,000 light-years ) [ 8 ] and is approximately 765 kpc (2.5 million light-years ...

  3. NGC 828 - Wikipedia

    en.wikipedia.org/wiki/NGC_828

    NGC 828 is a spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is 5200 ± 17 km/s, which corresponds to a Hubble distance of 250.2 ± 17.5 Mly (76.70 ± 5.37 Mpc). [1] Additionally, three non-redshift measurements give a distance of 223.52 ± 7.06 Mly (68.533 ± 2.165 Mpc). [2]

  4. 3C 66A - Wikipedia

    en.wikipedia.org/wiki/3C_66A

    3C 66A is a blazar [1] [2] located in the constellation Andromeda.. The "distance" of a far away galaxy depends on the distance measurement used. With a redshift of 0.444, [1] [2] light from this active galaxy is estimated to have taken around 4.5 billion years to reach Earth. [2]

  5. File:Milky Way and Andromeda in space, to scale.jpg

    en.wikipedia.org/wiki/File:Milky_Way_and...

    English: This image shows the Milky Way and Andromeda galaxies in space to scale. It illustrates both the size of each galaxy and the distance between the two galaxies, to create a better understanding of relative sizes and distances.

  6. List of the most distant astronomical objects - Wikipedia

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

    For comparisons with the light travel distance of the astronomical objects listed below, the age of the universe since the Big Bang is currently estimated as 13.787±0.020 Gyr. [1] Distances to remote objects, other than those in nearby galaxies, are nearly always inferred by measuring the cosmological redshift of their light. By their nature ...

  7. List of NGC objects (1–1000) - Wikipedia

    en.wikipedia.org/wiki/List_of_NGC_objects_(1–1000)

    Lenticular galaxy: Andromeda: 00 h 18 m 23.6 s +30° 03′ 47″ 14.8 72: Barred spiral galaxy: Andromeda: 00 h 18 m 28.4 s +30° 02′ 26″ 15.0 73: Intermediate spiral galaxy: Cetus: 00 h 18 m 39.0 s: −15° 19′ 20″ 13 74 Lenticular galaxy: Andromeda: 00 h 18 m 49.4 s +30° 03′ 42″ 16 75: Lenticular galaxy: Pisces: 00 h 19 m 26.4 s ...

  8. List of nearest galaxies - Wikipedia

    en.wikipedia.org/wiki/List_of_nearest_galaxies

    Most distant (difficult) naked eye object. Closest unbarred spiral galaxy to us and third largest galaxy in the Local Group. 61,100 ly 96 Andromeda XXI [66] dSph [53] 2.802 0.859 −9.9 Local Group: Satellite of Andromeda 97 Tucana Dwarf: dE5 2.87 0.88 [7] −9.16 15.7 [1] Local Group [7] Isolated group member — a 'primordial' galaxy [67] 98 ...

  9. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth. The techniques ...