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The Planets and Other Orbiting Rocks (Unit 1: Objects in Space)
Terms in this set (15)
The 3 requirements for being called a planet:
1) Orbiting a star, 2) Being forced into a sphere by its own gravity, 3) Clearing the area near its orbit of similarly sized (or larger) objects
The reason why Pluto is not considered a planet:
There are other similar objects near Pluto's orbit (other Kuiper Belt objects)
The inner planets, in order of distance from the Sun:
Mercury, Venus, Earth, Mars
The outer planets, in order of distance from the Sun:
Jupiter, Saturn, Uranus, Neptune
Five ways in which the outer planets are different from the inner planets (not including their distance from the Sun):
They... 1) are larger 2) are colder 3) are mostly gas 4) have more moons and 5) have rings.
Another name for the inner planets:
Terrestrial Planets or Rocky Planets
One other name for the outer planets:
Gas Giants or Jovian Planets.
a rock that orbits the Sun and is larger than a pebble but smaller than a planet
The size of the largest asteroid:
600 miles across
a rock that orbits the Sun and is pebble sized or smaller
an asteroid or meteoroid that it is in the process of falling through the Earth's atmosphere from outer space (a "shooting star")
an asteroid or meteoroid that has hit the Earth's surface
The place where most asteroids are found:
The Asteroid Belt, between the orbits of Mars and Jupiter.
The reason meteors give off light:
Moving so fast that friction from the Earth's atmosphere produces tremendous heat
The Kuiper Belt (pronounced Ky-per):
A region of icy objects (including Pluto) beyond Neptune's orbit.
THIS SET IS OFTEN IN FOLDERS WITH...
Structure and Scale of The Universe (Unit 1: Objec…
The Sun and Other Stars (Unit 1: Objects…
Satellites, Moons, Comets, and Orbits (Unit 1: Obj…
Beyond The Solar System (Unit 1: Objects in Space)