Barred spiral galaxy NGC Hubble Space Telescope image It is known as a barred spiral as the arms radiate from a central bar running left right rather than radiating spirally from the nucleus itself as in most spiral galaxies The factors leading to the formation of a bar are unclear The arms are dominated by hot young blue stars and pink starbirth regions The nucleus and bar comprise mainly older redder stars and dust which combine to give it a yellower appearance NGC lies around million light years from Earth in the constellation Eridanus This image was taken in September