1. STAAR Review DAY 7 EARTH AND SPACE
TEKS 8.8A (R), 8.8B (S), 8.8C (S), 8.8D (S)
© Hedgehog Learning

2. We are just a speck…
If we were traveling at the speed of light, it would take us _________ to reach ________.
Moon
Sun
Saturn
Nearest Star (Proxima Centauri)
Crab Nebulae
Center of the Milky Way
Nearest galaxy (Andromeda)
Other side of the universe
1 second
8 minutes
1 hour
4.2 years
6,500 years
26,000 years
2,500,000 years
93,000,000,000 years
© Hedgehog Learning

3. Solar System
Our own personal star
Our solar system is extremely tiny compared to the Milky Way Galaxy.
© Hedgehog Learning

4. Stars
© Hedgehog Learning
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.

5. Life Cycles of Stars
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?
Brighter
© Hedgehog Learning
Hotter Cooler

6. Galaxies
© Hedgehog Learning
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

7. © Hedgehog Learning

8. © Hedgehog Learning

9. © Hedgehog Learning

10. I C
© Hedgehog Learning E G B H F D A