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Astronomy- planets

Marano- Astronomy- Planets

solar system made of sun, planets and other bodies that travel around it
Nebula very large clump of gas (hydrogen and helium)
Two forces that keep the nebula in balance gravity and pressure
Planetesimals the tiny building blocks of celestial objects formed when the bits of dust stick together within the nebula
Examples of planetesmials planets, comets, stars, meteors
Used to measure the distance between planets astronomical units (AU)
1 AU average distance between the Earth and the Sun
Describe the inner planets terrestrial planets- smaller, denser, rockier, hotter and more closely spaced
name inner planets Mercury, Venus, Earth and Mars
Describe the outer planets gaseous- larger, cooler, nonsolid and have rings except for Pluto
Name the outer planets Jupiter, Saturn, Uranus, Neptune and Pluto
Mercury the planet that has the greatest temperature range and is the second smallest
Venus Called morning or evening star and is the hottest planet due to the greenhouse effect
Venus Retrograde rotation
Retrograde rotation rotates backwards and clockwise
Prograde rotation normal and counterclockwise
Earth Planet that is 3/4 water and has life
Mars red planet with thin atmosphere, polar ice caps and 2 volcanic systems
Jupiter largest planet that has a Great Red Spot and 28 moons
Saturn Second largest planet with a complex ring system and moon called Titan
Neptune Planet that crosses in and out of Pluto's orbit, blue world and great dark spot
Pluto smallest planet with retrograde rotation, ice, with moon called Charon
Created by: seagullq