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University of Phoenix Material
Basics of Astronomy Worksheet
Complete the table based on the readings for this week: Ch. 1–4 of The Essential Cosmic Perspective.
|Term or concept |Definition and explanation |
|The Universe | |
| | |
|What is Earth’s Sun and what is its role in the solar system? | |
|What is the Milky Way galaxy and the Sun’s position in it? | |
|What is the Big Bang and what does it say about the age of the | |
|universe? | |
|What is meant by the phase “looking out in the universe is looking | |
|back in time?” | |
|Location in the Universe | |
| | |
|What is Earth’s place in the solar system? | |
|How close are the nearest stars to the Sun as compared to the | |
|distance between the Sun and the Earth? | |
|How large is the Milky Way galaxy? | |
|How many stars are estimated to exist in this galaxy? | |
|How old is the earth compared to the universe itself? | |
|Motion in the Universe | |
| | |
|How fast does the Earth move around the Sun? Compare that to fast | |
|things in day-to-day life. | |
|How is the Sun moving in the galaxy? | |
|How are the galaxies around the Milky Way galaxy moving from humans’| |
|point of view? | |
|Significance of the Celestial Sphere | |
| | |
|What important directions and coordinate systems help you find your | |
|way around the sky? | |
|Why do stars have different levels of brightness and how does one | |
|describe their brightness as compared to one another? | |
|What are constellations? | |
|What is Polaris, and what is its significance in the sky? | |
|Why does the Moon change its phase, how does it move, and how do | |
|these combine to create eclipses? | |
|History of Astronomy | |
| | |
|What is the science of astronomy? | |
|What is the scientific method, and how does it relate to the science| |
|of astronomy? | |
|Who was Aristotle, and what was his relationship to the science of | |
|astronomy? | |
|What was the Copernican revolution? | |
|What observations did Galileo make that proved that planets go | |
|around the Sun? | |
|Seasons of the Earth | |
| | |
|How does the Earth rotate, and how does that relate to day and night| |
|or the seasons? | |
|How does the Earth revolve, and how does that relate to day and | |
|night or the seasons? | |
|What causes the seasons? Is it the tilt of the Earth’s axis or its | |
|changing distance from the Sun throughout the year? | |
|Gravity, Free Fall, and Orbits | |
| | |
|What is gravity, and how much weaker does it get as you get farther | |
|from the center of a body? | |
|Are objects in orbit of the Earth still under the influence of | |
|gravity? | |
|An object in orbit falls around the Earth. What do planets, comets, | |
|and asteroids fall around? | |
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