Introduction to astronomy. The daily motion of the sky
Answers are for parents and teachers.
1
By how many degrees do the stars shift in 5 hours?
75
2
At latitude 30° how many degrees does the swing plane turn in 6 hours? (T = 48 h)
45
3
For how many years did Biruni (973–1048) live?
75
4
Write two branches of astronomy and what each does.
For example: astrometry measures positions and motions; cosmology studies the Universe as a whole.
5
Why do we not feel the Earth’s rotation directly? Explain briefly.
The rotation is smooth and at constant speed, and we and the atmosphere move along with the Earth, so no relative motion is felt.