The primary difference between lenticular and spiral galaxies lies in the presence or absence of spiral arms around the galaxy's central bulge. According to the Sloan Digital Sky S...
About Spiral Galaxies
Eighty percent of the galaxies in the universe can be classified as spiral galaxies. The distinguishing characteristics of spiral galaxies are the appearance of "arms" that seem to spiral around a central bulge of stars and dust--hence the name. The...
A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in
his 1936 work The Realm of the Nebulae and, as such, forms part of the ...
The most common type of galaxy is called a "spiral galaxy." Not surprisingly,
spiral galaxies look like spirals, with long arms winding toward a bright bulge at
are subdivided into classes based on how tightly the arms are wound, with the tightest classified as Sa and those with the most loosely wound arms as Sd.
Some spiral galaxies
have a "bar" passing through the center off which the spiral
arms extend. Withi... More »
Aug 15, 2013 ... A spiral galaxy has a distinct winding shape. Most of the galaxies observed by
astronomers are spiral galaxies.
Spiral galaxies get their name from the shape of their disks. In a spiral galaxy, the
stars, gas and dust are gathered in spiral arms that spread outward from the ...
The figure below right shows a nice spiral galaxy, M100, which is in the Virgo
cluster Another beautiful example of a spiral galaxy is M83. Presumably our own
Spiral galaxies may remind you of a pinwheel. They are rotating disks of mostly
hydrogen gas, dust and stars. Through a telescope or binoculars, the bright ...
Dec 16, 2011 ... Resembling festive lights on a holiday wreath, this NASA/ESA Hubble Space
Telescope image of the nearby spiral galaxy M74 is an iconic ...