The length of the tropical years (the time interval between successive occurrences of the spring equinox) is decreasing very slowly as a result of
A. small, progressive changes in the earth's rotational speed
B. small, progressive change in earth's orbit around the sun
C. both (a) and (b)
D. None of the above
Answer:C
The length of the tropical years (the time interval between successive occurrences of the spring equinox) is decreasing very slowly as a result of
A. small, progressive changes in the earth's rotational speed B. small, progressive change in earth's orbit around the sun C. both (a) and (b) D. None of the above