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18 Cards in this Set
- Front
- Back
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What is astronomy? |
The scientific study of what is beyond Earth |
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What is a celestial object? |
Any object that exists in space |
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What is a universe? |
Everything that exists, including all energy, matter, and space |
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What is a star? |
A massive collection of gases, held together by it's own gravity and emitting huge amounts of energy |
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Define luminous. |
Producing and giving off light; shining |
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What is solar wind? |
A stream of high energy particles |
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Define a planet. |
A large, round, celestial object that travels around a star |
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What is the solar system? |
The sun and all objects that travel around it |
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What is a satellite? |
A celestial object that travels around a planet or dwarf plant |
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Define orbit. |
The closed path of a celestial object or satellite as it travels around another celestial object. |
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The four planets closest to the sun are known as what? |
Terrestrial planets |
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The four planets furthest from the sun are known as what? |
Gas giants |
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The moon is a type of... |
Satellite |
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What is a galaxy? |
A huge, rotating collection of gas, dust, and billions of stars, planets, and other celestial objects |
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Why can we see the moon at night if it is non-lumious? |
We can see it because the moon reflects light from the sun |
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What is electromagnetic (EM) radiation? |
Energy emitted from matter, consisting of electromagnetic waves that travel at the speed of light |
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What is electromagnetic (EM) spectrum? |
The range of wavelengths of electromagnetic radiation, extending from radio waves to gamma rays, and including visible light |
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What are sunspots? |
Dark spots appearing on the sun's surface that are cooler than th area surrounding them |
