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Planetary Science

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Wyatt Olson

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Cards in this guide (11)
Clouds of gas and dust in which stars from are called what

Clouds of gas and dust from which stars form are called interstellar matter.

Which planet was studied by the Mariner 10 probe and has a crater-covered surface

mercury

What percentage of the Sun is composed of helium

The sun in composed of 25 percent helium. The other 75 percent is hydrogen. The sun also has small amounts of other elements such as neon, oxygen, carbon, and magnesium.

What are massive celestial bodies of gases that emit heat and light by radiation

stars

What is the average rotation of the Sun on its axis

26 Days

Stars are formed from clouds of dust and gas called

molecular clouds

Sunspots follow a cycle of how many years

11 years.

What are warm moist air masses that form near the equator called

They are called maritime tropical air masses.

How many official constellations are currently recognized

88

Which planet completes its rotation in 59-60 Earth days

mercury

Pangea broke apart and the land masses drifting creating a process called

Continental drift.

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