Unbarred spiral galaxy
Videos
An unbarred spiral galaxy 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
The Whirlpool Galaxy and its companion satellite. The Whirlpool is an unbarred spiral galaxy.
Under the de Vaucouleurs classification system, SA galaxies are one of three types of spiral galaxy.
An example of this type, imaged by the Hubble Space Telescope
Ngc 3593
NGC 4414
Videos
NGC 4414, also known as the Dusty Spiral Galaxy, is an unbarred spiral galaxy about 62 million light-years away in the constellation Coma Berenices. It was discovered by German-British astronomer Will
Unbarred spiral galaxy
…NGC 3169 SAa NGC 3169 is an "SA(s)a pec" Messier 81 SAab M81 is an "SA(s)ab" Messier 88 SAb M88 is an "SA(rs)b" NGC 3949 SAbc NGC 3949 is an "SA(s)bc" NGC 4414 SAc NGC 4414 is an "SA(rs)c" Triangulum Galaxy SAcd Triangulum is an "SA(s)cd" NGC 300 SAd NGC 300 is an "SA(s)d" NGC 45 SAdm SAdm can also be considered…
NGC 4414 as observed by the Hubble Space Telescope (HST)
Hubble Space Telescope image of NGC 4414, showing SN 2021J and SN 2023hlf.