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What kind of planet is Earth?
Ordinary Rocky planet
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How many known planets do we have?
8
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How many stars are in our solar system what is their name(s)?
1, the sun
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What is the name of our Galaxy?
Milkey way galaxy
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What is the sun composed of?
its a hot ball of gas, composed of hydrogen and helium.
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Definition of the Universe?
The totality of all space, time, matter, and energy.
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Definition of Astronomy?
The study of the universe
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Definition of a light-year?
- distance traveled by light in a year.
- speed of about 300,000 kilometers per second
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Definition of hypothesis?
one possible explanation of the observed facts.
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Who argued that the Earth was round?
D. Aristotle
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Definition of Constellations?
a human grouping of the stars in the night sky into a recognizable pattern.
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Orion was a mythical ______ hero famed for his amorous pursuit of the _______.
Greek, Pleiades
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What is Pleiades?
- The seven daughters of the giant Atlas.
- (God put Pleiades in the night sky to protect them from Orion, who stalks them nightly)
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