The Sun is at an average distance of about ________ million kilometers away from Earth?
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Answer: B. 150 million
Explanation
Earth orbits the Sun at an average distance of about 150 million kilometers. This separation distance defines one astronomical unit used widely in planetary measurements. Orbital eccentricity causes this distance to vary slightly throughout the yearly revolution. Astronomical units provide a convenient scale for measuring distances within our solar system. Light traveling at constant speed takes roughly eight minutes to bridge this solar gap. Kepler's laws describe planetary orbits around the Sun based on gravitational mechanics.
Climate stability on Earth depends heavily on maintaining this average distance from the Sun. Space probes calculate fuel requirements based on astronomical distance measurements to other planets. Solar radiation intensity at this distance supports liquid water oceans on Earth's surface. 100 million kilometers underestimates the actual average Earth-Sun orbital distance. 200 million kilometers overestimates the true separation between Earth and the Sun. 250 million kilometers places the orbit much further out than the actual measured value.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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