Stars Planets and Moons Cornell Notes Page 73

Stars, Planets, and Moons Cornell Notes Page 73

Stars • the Sun is our closest star • a massive sphere of gas • so much pressure from its own gravity, nuclear fusion takes place- this creates “sunlight!” • Hydrogen Helium

Sunlight • Electromagnetic Radiation (energy emitted through space as particles or waves) – Mostly visible light, UV light, and infrared, some radio and microwaves. – Most X-rays and Gamma rays are absorbed by earth’s atmosphere (don’t reach surface)

Planetary Nebula

http: //www. seasky. org/cosmic/sky 7 a 01. html

To scale or not to scale?

Planets • body that revolves around a star • large enough to be rounded by own gravity • has cleared an orbit for itself

Planets • body that revolves around a star • large enough to be rounded by own gravity • has cleared an orbit for itself- Pluto has debris in its path- not a true planet!

Solar System on a Sentence Strip • Please follow along with me!

Our Solar System • Cornell Notes page 79

Our Solar • 8 planets revolve around our sun, as well as many System other celestial bodies • Heliocentric

4 Inner Planets • Mercury, Venus, Earth, Mars • “Terrestrial Planets” • Small, dense, rocky

Asteroid Belt • Between Mars and Jupiter • Many irregularly shaped bodies called asteroids and minor planets

4 Outer Planets • Jupiter, Saturn, Uranus, Neptune • Very Large • “Gas Giants” and “Ice Giants”

Pluto • Originally the 9 th planet • Located in the Kuiper Belt- (similar to the asteroid belt but objects are small and icy) along with Eris, another dwarf planet.

Charon- Pluto’s big moon