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100

What is the planet closest to earth

Mercury

100

What type of galaxy is the Milky Way

Spiral galaxy

200

What is the biggest planet

Jupiter

200

What is in the center of the Milky Way

Black hole

300

What is the coldest planet

Neptune

300

Approximately how much of the earth is water

75%

400

What planet has the shortest day

Jupiter

400

What planet did NASA want to put man on

Mars

500

What planet has the nickname '' The sideways planet''

Uranus

500

What planet has the longest days

Venus

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