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Q: Which one of the following units is used by astronomers for measuring larger stellar and extragalactic distances?
  • A. Fathom
  • B. Ampere
  • C. Knot
  • D. Light year
Correct Answer: Option D - For most space objects, light-years is used to describe their distance. Light year units is used by astronomers for measuring larger stellar and extraglactic distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). Speed of light is = 3×108 m/s Time = 365 days S=d/t d = 9.46 × 10¹⁵ meters.
D. For most space objects, light-years is used to describe their distance. Light year units is used by astronomers for measuring larger stellar and extraglactic distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). Speed of light is = 3×108 m/s Time = 365 days S=d/t d = 9.46 × 10¹⁵ meters.

Explanations:

For most space objects, light-years is used to describe their distance. Light year units is used by astronomers for measuring larger stellar and extraglactic distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). Speed of light is = 3×108 m/s Time = 365 days S=d/t d = 9.46 × 10¹⁵ meters.