1. 2 th 3 4 5 galaxies and shapes (…cont.) spiral galaxies: can be broken down in two categories...
TRANSCRIPT
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What else is in the sky?
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The Universe
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ThThe Universe is everythingthat exists in space
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Galaxies
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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.
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Galaxies!It is estimated that there are billions of other galaxies in the
universe.
The Milky Way (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.
We are a spiral galaxy.
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STARS
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Star color & temperature
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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.
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Star Constellations Examples (…
Cont.)
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Is the sun a big star or a littlestar?
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Asteroids
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Asteroids are chunks of rocks that never became planets
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COMETS
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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.
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Parts of a comet, nucleus, coma and tail
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Dust
Small particles between the space of the planets.
Forms from asteroid collisions
Size is the width of a human hair