main types of galaxies.ppt

7/25/2019 Main Types of Galaxies.ppt

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Galaxies


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What is a galaxy?

A galaxy is a large grouping of stars,gas, and dust in space that are heldtogether by gravity.

The largest galaxies contain morethan a trillion stars. Smaller galaxiesmay have only a fe million.

Scientists estimate the number ofstars from the si!e and brightness ofthe galaxy.


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"ain Types of

GalaxiesSpiral

Elliptical

Irregular


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#roperties of

Spiral Galaxies Shaped li$e flattened

dis$s ith one or

more spiral arms.

%ur galaxy, "il$y Way, is

a spiral galaxy.

%ur solar system is

located in one of the spiral

arms.
http://antwrp.gsfc.nasa.gov/apod/image/0212/m33_noao_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0212/m33_noao_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0212/m33_noao_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0212/m33_noao_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0207/m51_hallas_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0212/m33_noao_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0207/m51_hallas_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0207/m51_hallas_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0203/n4631zeiders_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0207/m51_hallas_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0212/m33_noao_big.jpg


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#roperties of

&lliptical Galaxies

'ound or elliptical in shape.

(ontain very little gas or dust.

)ecause of little gas, no ne

stars are forming. The largest and smallest

galaxies are elliptical galaxies.

About *+ of all galaxies. Simply massive blobs of stars.
http://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0303/m101_cfht_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0208/ngc300_eso_big.jpghttp://antwrp.gsfc.nasa.gov/apod/image/0303/m101_cfht_big.jpg


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#roperties of

-rregular Galaxies

o not fit into any other

category.

(haotic mix of stars, gas

and dust /sually found near large

spiral galaxies ho may

be distorting their shape.


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(ontents of Galaxies

Galaxies are made

of stars, planetary

systems, gas

clouds, and starclusters. 0ebulas

are giant clouds of

gas and dust herestars may be

forming.

0ebula are found

in spiral galaxies

but not elliptical

alaxies.


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Galaxy 1ui!


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Galaxy 1ui!


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Galaxy 1ui!


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What is the name of our

galaxy?

2


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escribe the "il$y Way Galaxy


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escribe the "il$y Way Galaxy

Flattened Disk

Bulge in Middle

Fried Egg Not solid from edge to edge

Huge

1000-3000 Light Years Thik 100!000 Light Years aross "Diameter#


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Where is our solar system in

our galaxy? The $un and our solar s%stem is loated in

one of the outer arms "&rion's (rm# of the

gala)%* The distane from the $un to the

enter of the gala)% is a+out 30!000 light%ears*

(ll o+,ets in the gala)% reole around its

enter*

The sun and our solar s%stem take a+out ./0million %ears to make one tri around the

enter of our gala)%*


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main types of galaxies.ppt

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