A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar
gas, dust, and ..... At the other extreme, an Sc galaxy has open, well-defined arms
and a small core region. A gal...
Galaxy definition, a large system of stars held together by mutual gravitation and
isolated from similar systems by vast regions of space. See more.
Sep 17, 2012 ... “Galaxy,” Defined — when I came across a paper with this title while browsing a
recent issue of Astronomical Journal, I was intrigued.
A galaxy is a collection of stars and planets that are held together by gravity. In a
galaxy, the celestial bodies rotate around a central object.
astronomy : any one of the very large groups of stars that make up the universe.
the Galaxy : the galaxy in which we live. : a large group of important or ...
Today we are nearly overwhelmed with data on the immense diversity of galaxies
, to the extent that it actually becomes difficult to write down a definition that ...
a system of millions or billions of stars, together with ... Meaning, pronunciation,
example sentences, and more from Oxford Dictionaries.
The definition of a galaxy is a large area, particularly of dust, stars and gas that
makes up a universe. An example of a galaxy is the Milky Way. YourDictionary ...
Apr 26, 2016 ... ... heard that our Sun is located in the Milky Way galaxy. But what is a galaxy
anyway? The simple answer is that a galaxy is a collection of s.
Jan 27, 2011 ... A pair of astronomers call for a debate on a tricky definition. ... You might think a
galaxy is simply a large group of stars, but just how many stars ...