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.
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 ...
a system of millions or billions of stars, together with ... Meaning, pronunciation,
example sentences, and more from Oxford Dictionaries.
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 ...
Mar 16, 2012 ... A more common recent definition appeals to the presence of dark matter: a
galaxy contains it, while a star cluster such as a GC does not.
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.
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 ...