Liberapedia
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A '''Galaxy''' can be roughly defined as a collection of 10^7 to 10^12 gravitationally-bound [[star]]s. Our [[sun]] is in a galaxy that is called the "[[Milky Way]]".
A '''Galaxy''' can be roughly defined as a collection of 10^7 to 10^12 gravitationally-bound [[star]]s. Our [[sun]] is in a galaxy that is called the "[[Milky Way]]". Galaxies vary in size and shape, some are elliptical <ref>[http://www.enchantedlearning.com/subjects/astronomy/stars/galaxy/elliptical.shtml elliptical]</ref>, some are spiral galaxies <ref>[http://www.enchantedlearning.com/subjects/astronomy/stars/galaxy/spiral.shtml spiral galaxies]</ref> and some are irregular <ref>[http://www.enchantedlearning.com/subjects/astronomy/stars/galaxy/irregular.shtml irregular]</ref>. Galaxies contain stars, [[planet]]s, [[black hole]]s, interstellar gas and dust as well as other objects like [[comet]]s. New stars form from the gas and dust in a galaxy. Astronomers believe that at the centre of every galaxy is one terrifyingly large [[black hole]].
 
   
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==About galaxies==
 
Galaxies vary in size and shape, some are elliptical <ref>[http://www.enchantedlearning.com/subjects/astronomy/stars/galaxy/elliptical.shtml Elliptical Galaxies]</ref>, some are spiral <ref>[http://www.enchantedlearning.com/subjects/astronomy/stars/galaxy/spiral.shtml Spiral Galaxies]</ref> and some are irregular <ref>[http://www.enchantedlearning.com/subjects/astronomy/stars/galaxy/irregular.shtml Irregular Galaxies]</ref>. Galaxies contain stars, [[planet]]s, [[black hole]]s, interstellar gas and dust as well as other objects like [[comet]]s. New stars form from the gas and dust in a galaxy. Astronomers believe that at the centre of every galaxy is one terrifyingly large [[black hole]].
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==Starlight problem==
 
Light from distant galaxies has been traveling for millions of years, hundreds of millions of years and thousands of millions of years to reach [[Earth]]. The existence of light that has been traveling for a very long time is yet more evidence against [[Young Earth Creationism]], this is known as the starlight problem. <ref>[http://rationalwiki.org/wiki/Starlight_problem Starlight problem]</ref>
 
Light from distant galaxies has been traveling for millions of years, hundreds of millions of years and thousands of millions of years to reach [[Earth]]. The existence of light that has been traveling for a very long time is yet more evidence against [[Young Earth Creationism]], this is known as the starlight problem. <ref>[http://rationalwiki.org/wiki/Starlight_problem Starlight problem]</ref>
   

Revision as of 08:09, 7 November 2012

A Galaxy can be roughly defined as a collection of 10^7 to 10^12 gravitationally-bound stars. Our sun is in a galaxy that is called the "Milky Way".

About galaxies

Galaxies vary in size and shape, some are elliptical [1], some are spiral [2] and some are irregular [3]. Galaxies contain stars, planets, black holes, interstellar gas and dust as well as other objects like comets. New stars form from the gas and dust in a galaxy. Astronomers believe that at the centre of every galaxy is one terrifyingly large black hole.

Starlight problem

Light from distant galaxies has been traveling for millions of years, hundreds of millions of years and thousands of millions of years to reach Earth. The existence of light that has been traveling for a very long time is yet more evidence against Young Earth Creationism, this is known as the starlight problem. [4]

See Also

How Conservatives see Galaxies

References

External links

Videos