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
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 ...
Thumbnail image. Click to load APOD for this date. APOD: 2003 March 10 - M101
: The Pinwheel Galaxy Explanation: Why do many galaxies appear as spirals?
When Hubble developed his classification system for galaxies based on their
appearance in optical light, he divided the spirals into those in which the spiral
Click icon to see a spiral galaxy of Messier's catalog ... Among the galaxies, there
are apparently three main categories, according to their appearance: the disk ...
Apr 2, 2013 ... Spiral galaxies are some of the most beautiful and photogenic residents of the
universe. Our own Milky Way is a spiral. Our solar system and ...
A composite image of the Messier 81 (M81) galaxy shows what astronomers call
a "grand design" spiral galaxy, where each of its arms curls all the way down ...
The classification of galaxies due to Hubble (1925) remains the most popular in
use today. There are two main categories, the spiral and elliptical galaxies, but ...
Mar 18, 2016 ... Astronomers have identified 53 “super spirals” — spiral galaxies that are huge
and incredibly luminous — as part of a project exploring ...