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2. Whirlpool Galaxy - Wikipedia

   en.wikipedia.org/wiki/Whirlpool_Galaxy

   The Whirlpool Galaxy lies at a distance of 23 [2] to 31 million light-years from Earth. [18] Based on the 1991 measurement by the Third Reference Catalogue of Bright Galaxies using the D 25 isophote at the B-band, the Whirlpool Galaxy has a diameter of 23.58 kiloparsecs (76,900 light-years). [2] [5] Overall the galaxy is about 88% the size of ...

3. List of largest stars - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_stars

   Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi).

4. BX442 - Wikipedia

   en.wikipedia.org/wiki/BX442

   BX442 (Q2343-BX442 [1]) is a grand design spiral galaxy of type Sc. [1] It has a companion dwarf galaxy.It is the most distant known grand design spiral galaxy in the universe, with a redshift of z=2.1765 ± 0.0001. [1]

5. Unbarred spiral galaxy - Wikipedia

   en.wikipedia.org/wiki/Unbarred_spiral_galaxy

   The Whirlpool is an unbarred spiral galaxy. An unbarred spiral galaxy [1] [2] is a type of spiral galaxy without a central bar, or one that is not a barred spiral galaxy. It is designated with an SA in the galaxy morphological classification scheme. A nearby example of an unbarred spiral is the Triangulum Galaxy.

6. The Scale of the Universe - Wikipedia

   en.wikipedia.org/wiki/The_Scale_of_the_Universe

   Cartwheel Galaxy — 150,000 light years 1.5 × 10 21 meters Pinwheel Galaxy: 1.8 × 10 21 meters 170,000 light years 1.7 × 10 21 meters Whirlpool Galaxy — 180,000 light years 1.8 × 10 21 meters NGC 1232: 2 × 10 21 meters 220,000 light years 2.2 × 10 21 meters Virgo A: 2.5 × 10 21 meters 250,000 light years 2.5 × 10 21 meters Tadpole ...

7. Canes Venatici - Wikipedia

   en.wikipedia.org/wiki/Canes_Venatici

   One of the more significant galaxies in Canes Venatici is the Whirlpool Galaxy (M51, NGC 5194) and NGC 5195, a small barred spiral galaxy that is seen face-on. This was the first galaxy recognised as having a spiral structure, this structure being first observed by Lord Rosse in 1845. [ 12 ]