Spiral galaxies are the most common type of galaxy in the universe, making up 77 percent of all known galaxies. These galaxies have long arms that wrap around a bright bulging...
Types of Spiral Galaxies
Galaxies are large collections of stars, dust and gas held together by gravitational forces. Large galaxies may contain billions of stars, while small ones may have just a few hundred. They can be different shapes as well: spiral, elliptical, lenticular...
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 ...
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 »
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
Aug 15, 2013 ... This Hubble Space Telescope photo of Messier 74 reminds us that spiral
galaxies are some of the most beautiful and photogenic residents of ...
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 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 ...
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 ...