the milky way our home galaxy galaxies 3 main types spiral/barre d elliptical irregular
Post on 29-Dec-2015
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THE MILKY WAY
Our Home Galaxy
GALAXIES
3 Main Types
•Spiral/Barred
•Elliptical
•Irregular
MILKY WAY
•Spiral Galaxy, type Sb
•Difficult to observe
•Looks like spilt milk in the sky, hence the name
STRUCTURE
•Disk
•Galactic Bulge
•Halo
Galactic Bulge
•Consists of mostly older stars, •Densely Populated•May Contain A Black Hole At The Center
Galactic Disk
• Younger Stars Are Found
• Where Our Sun Is Located•Spiral Arms Present
Galactic Halo
•Hard To Detect
•Little Gas And Dust
•Old Stars
GALACTIC NEIGHBOURS
•Small and Large Magellanic Clouds•Sagittarius Dwarf Elliptical Galaxy
•Andreomeda Galaxy
THE LOCAL GROUP•Galaxy
Cluster•About 20 Galaxies
•1 Mpc Across
•Mostly Irregular and Elliptical
Our Galaxy Also Interacts With Others
THE END
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