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Astronomy Unit 5

Terms in this set (23)

Nebula
The solar system started as
Pluto-Charon
Considered a binary planet
Revolution
Planets close to the sun have the smallest
Jupiter, Saturn, Neptune, Uranus
Which planets have rings?
Venus
Which planet is the closest in size to earth
Angular Momentum
Planets orbit in the same direction around the sun due to Conservation of..
Titan
What is not a moon of Jupiter
Coma
The glowing head of a comet.
Ceres
The first dwarf planet discovered.
Ice
Comets are mostly made of
4.6 billion years
The age of the Earth is thought to be
Hydrogen and Helium
The atmosphere of Jupiter is mostly composed of
Clyde Tombaugh
Who discovered Pluto
Oort Cloud
Long period comets come from
Planet 9
The major planet that might exist past Neptune is called
Iron
The most common element in the Earth
Asteroid Belt
The inner and outer solar system is separated by
Venus
The hottest planet is
A random pile of rocks
The face on Mars is actually
Nitrogen
THe most common gas in Earth's atmosphere is
The moon has little or no weathering.
Why does the moon have more impact craters than the Earth
Nuclear Fusion
The sun began when a protostar began
Mars, Saturn, and Jupiter
Science fiction stories have been set on or near
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