Our Solar System

What keeps the planets orbiting the Sun, and the Moon orbiting Earth?

• Air Pressure

• Nuclear Fusion

• Gravity

• Magnetic Fields

What is ASTRONOMY?

• Physics

• Science of objects beyond Earth

• Science of Stars

• Science of Earth

What is the chemical composition of a star?

• Helium, Hydrogen, and metal

• Molten lava and rocks

• Hydrogen, Helium, and metal

• Liquids and Gas

Any object in space is considered to be a ....................

• Celestial Object

• Satellite

• Planet

• Star

Are there any planets we can see with an unaided eye?

• Yes

• No

Explain the Universe's structure in a sentence.

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Planets are devided to:

• Terresstial and Gas planets

• Liquid and Gas Planets

• Inhabitable and Uninhabitable Planets

How do we know what stars are made of?

• By analyzing the light using a spectrograph

• By measuring the distance between the star and Earth

• By measuring the star's temperature

Give an example of heavy and light elements in space.

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If the Moon does not produce its own light, how are we able to see it?

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