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EARTH AND SPACE
TEKS 8.8A (R), 8.8B (S), 8.8C (S), 8.8D (S)
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If we were traveling at the speed of light, it would take
us _________ to reach ________.
1 second
Moon
8 minutes
Sun
1 hour
Saturn
4.2 years
Nearest Star (Proxima Centauri)
6,500 years
Crab Nebulae
26,000 years
Center of the Milky Way
2,500,000 years
Nearest galaxy (Andromeda)
93,000,000,000 years
Other side of the universe
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Our own personal star
Our solar system is
extremely tiny
compared to the
Milky Way Galaxy.
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Stars
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The stars we see at night
are located “nearby” in
the Milky Way galaxy.
Stars in other galaxies are
too far away for us to see
them individually.
Stars have “life cycles”
similar to plants and
animals. Average stars,
like our Sun, are born in
nebulas and die as red
giants.
Brighter
Models, like a
Hertzsprung‐Russell diagram,
show us how stars change
over time.
Based on this diagram, what
would you say about the age
of our Sun compared to other
stars on the main sequence?
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Hotter
Cooler
Galaxies
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Our galaxy, the Milky
Way galaxy, is made up
of BILLIONS of stars.
There are BILLIONS of
galaxies in the universe.
Types of galaxies
include:
• Spiral galaxies
• Barred spiral galaxies
• Elliptical galaxies
• Dwarf galaxies
• Ring galaxies
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