What is a galaxy???!!!!?

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What is a galaxy???!!!!?

Post  madi123 on Thu Jun 17, 2010 5:49 am

What is a galaxy???!!!!?
and what types of galaxies are there?
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Re: What is a galaxy???!!!!?

Post  jvpl on Thu Jul 15, 2010 9:24 pm

A galaxy is a cluster of stars, nebulae, dark matter, and other astronomical objects. Most galaxies are tens of thousands of light years in diameter, and contain billions of stars. Galaxies come in three primary shapes; spiral galaxies are thin disks, with spiral arms surrounding a central hub; elliptical galaxies are uniform, oval-shaped agglomerations; and irregular galaxies have little or no definite structure.

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Re: What is a galaxy???!!!!?

Post  sachingupta on Thu Nov 18, 2010 5:21 am

Galaxies are large systems of stars, dust and gas bound together by gravitational force. They are elliptical, spiral or irregular in shape. Our Sun is part of a spiral galaxy called the Milky Way, and lies about two-thirds of the way out from the centre to the edge.


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Re: What is a galaxy???!!!!?

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