A galaxy is a collection of stars, gas, and dust bound together by gravity. The smallest galaxies may contain only a few hundred thousand stars, while the largest may have hundreds of billions. Galaxies are spread about by vast distances, separated by (relatively) empty space. Their diameters may range from hundreds of light years across (for the smallest dwarf galaxies) to hundreds of thousands of light years across.
Here is Part 1 of a collection of some of my favourite images of galaxies. All credits go the respective owners of these images, and the Astronomy Picture of the Day, where these can all be found with detailed explanations.
The Sombrero Galaxy:
The Andromeda Galaxy:
NGC 1300:
NGC 3190:
The Milky Way Galaxy:
wonderful
awesome pics …………the universe is so beautiful………..!
amazing!
How can anybody look at this and say there is no God???
To make such a statement requires almost total ignorance of physics, cosmology,
biology, geology, numeracy, in fact, almost total ignorance of all knowledge of the natural universe gained through the lifelong efforts of highly intelligent and learned people. This is “argument from ignorance;” you don’t understand it, so it doesn’t exist. http://factsnotfantasy.com/evolution.php
http://www.sciforums.com/encyclopedia/Evolution_Denial
How can anybody look at this and say that some illiterate peasants 2000 years ago who believed that the earth was flat, the sun and moon and stars were tiny and revolved about the earth, and that the
entire universe had been created just for them . . . were right?