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Milky Way Galaxy's spiral arms and barred core – based on WISE data. The Milky Way was once considered an ordinary spiral galaxy. Astronomers first began to suspect that the Milky Way is a barred spiral galaxy in the 1960s.
A spiral galaxy is a type of galaxy characterized by a central bulge of old Population II stars surrounded by a rotating disc of younger Population I stars. A spiral galaxy maintains its spiral arms due to density wave theory.
An example of a spiral galaxy (Pinwheel Galaxy). This category contains galaxies in the S (de Vaucouleurs for indeterminate) category or any galaxy where it is indeterminate whether the galaxy is SA, SB or SAB in its spiral nature. SA, S (Hubble) galaxies should be categorized under Category:Unbarred spiral galaxies
UGC 11861 is a barred spiral galaxy in the constellation of Cepheus.Its velocity with respect to the cosmic microwave background is 1334 ± 10 km/s, which corresponds to a Hubble distance of 19.68 ± 1.39 Mpc (~64.2 million light-years). [1]
NGC 7496 is a barred spiral galaxy located in the constellation Grus.It is located at a distance of about 60 million light-years from Earth, which, given its apparent dimensions, means that it is 75,000 light years across.
The Whirlpool Galaxy, also known as Messier 51a (M51a) or NGC 5194, is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus. [ 6 ] [ 7 ] [ 8 ] It lies in the constellation Canes Venatici , and was the first galaxy to be classified as a spiral galaxy. [ 9 ]
This galaxy is a member of a small group of galaxies that includes M65 and NGC 3628, known as the Leo Triplet or the M66 Group. [10] M65 and M66 are a common object for amateur astronomic observation, being separated by only 20′. [9] M66 has a morphological classification of SABb, [5] indicating a spiral shape with a weak bar feature and ...
NGC 1073 is a barred spiral galaxy in the constellation Cetus.The galaxy is estimated to be about 55 million light years from Earth, possess a disk spanning an estimated 80,000 light years in diameter, and likely contains a type of active core, called an HII nucleus.