1. 2 Th 3 4 5 Galaxies and Shapes (…Cont.) Spiral galaxies: can be broken down in two categories Circular spiral - round center Barred Spiral – bar.

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5 Galaxies and Shapes (…Cont.) Spiral galaxies: can be broken down in two categories Circular spiral - round center Barred Spiral – bar center Elliptical galaxies: are shaped like an egg.

Galaxies! It is estimated that there are billions of other galaxies in the universe. The Milky Way The Milky Way (the name of our GALAXY…and a delicious candy bar ) (the name of our GALAXY…and a delicious candy bar ) is the band of light that is produced by the thousands of stars that lie in the main section of our Galaxy. is the band of light that is produced by the thousands of stars that lie in the main section of our Galaxy. We are a spiral galaxy.

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Star color & temperature 8

9 Star Attractions: Constellations What do you see when you look up into the sky? Humans have seen group of stars that looks like imaginary animals, people, or mythological beings in patterns of star groupings. Ancient stargazers gave names to these groupings, as constellations. Click twice the borders of this screen to play a background movie.

10 Star Constellations Examples (…Cont.)

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A comet is a celestial body made of dust, gases, and ices (mainly water and carbon dioxide) that moves in an extremely elongated orbit about the sun. 15

Parts of a comet, nucleus, coma and tail 16

Dust Small particles between the space of the planets. Forms from asteroid collisions 17 Size is the width of a human hair

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