Astronomy 2

A.U. stands for

astronomical unit

Which planet is the largest?

Jupiter

Which planet is the smallest?

Mercury

A natural satellite is also called

a moon

which two planets have no natural satellite

Mercury & Venus

how many planets have rings

4, Jupiter, Saturn, Uranus, Neptune

which planet is tilted on its side

Uranus

The time it takes a planet to spin once on its axis is called

its rotation

The time it takes a planet to travel once around the sun is called

its revolution

Which planet has the shortest revolution

Mercury

Which planet has the longest revolution

Neptune

Which planet crosses orbits w/ the sub-planet Pluto

Neptune

What is found between Mars and Jupiter

Main asteroid belt

Where do most comets originate?

the Oort Cloud

Where are most sub-planets found

Kuiper Belt

Comets have two tails

the plasma tail and the dust tail

Which planet has a giant red spot/storm?

Jupiter

Why do Uranus and Neptune have a blue color b/c of the

Methane in the atmospheric