One astronomical unit is the average distance between:a)Earth and the ...
An astronomical unit is a unit of length equal to about 149,597,870.7 kilometers or approximately the mean Earth-Sun distance. The astronomical constant whose value is one astronomical unit is referred to as unit distance and is given by the symbol A.
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One astronomical unit is the average distance between:a)Earth and the ...
Explanation:
Earth and the Sun
- An astronomical unit (AU) is a unit of length used in astronomy, defined as the average distance between the Earth and the Sun.
- It is approximately 149.6 million kilometers or 93 million miles.
- This distance is used to measure distances within our solar system.
Earth and the Moon, Jupiter and the Sun, Pluto and the Sun
- The distances between Earth and the Moon, Jupiter and the Sun, and Pluto and the Sun are not defined as astronomical units.
- The Earth-Moon distance is about 384,400 kilometers or 238,855 miles.
- Jupiter is about 5.2 astronomical units away from the Sun on average.
- Pluto, which is no longer considered a planet, has a highly elliptical orbit ranging from about 30 to 50 astronomical units from the Sun.
Therefore, the correct answer to the question is option 'A', which is the average distance between Earth and the Sun, defined as one astronomical unit.