Q96
________ is the time taken by the Earth to return to a given point in its orbit with reference to a fixed star.
A.
Lunar year
B.
Sidereal year
AnswerC.
Solar year
D.
Tropical year
Answer: Option B
Solution
Answer: Option B
Solution:
Because, for all intents and purposes, the sky is "fixed", a sidereal day is when the earth rotates 360°. A sidereal day is 23 hours 56 minutes and 4.09 seconds long. A sidereal year is the time it takes for the sun to return to the same position with respect to the stars.