How many Types of Galaxies?
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M$3 Answers
1. spiral
2. barred
3. elliptical
4 irregular
Image #1 spiral, #2 barred, #3 elliptical, #4 irregular
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-quote-
"Galaxies come in three main types: ellipticals, spirals, and irregulars. A slightly more extensive description of galaxy types based on their appearance is given by the Hubble sequence. Since the Hubble sequence is entirely based upon visual morphological type, it may miss certain important characteristics of galaxies such as star formation rate (in starburst galaxies) and activity in the core (in active galaxies)."
-end of quote-
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Elliptical
Oval shaped
Most common type of galaxy found
Contains little gas and dust, Most are dim and difficult to see
Spiral
Dense center with spiral arms
Bright and easy to see
Contains large amounts of gas and dust – always producing new stars
Irregular
No specific shape
Contains large amounts of gas and dust
Small and faint therefore hard to see.
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