Which of the following is not a unit of time:
Correct answer: D. Light year
- A. Solar year
- B. Tropical year
- C. Leap year
- D. Light year
Explanation
Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
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