2nd Edition By
Andrew Fraknoi,
David Morrison,
Sidney Wolff
The amount of time between successive passes of any given star across the meridian is
- answer- 23 hours 56 minutes.
Which of the following statements about sidereal and solar days is not true? - answer-
The time it takes for the Moon to make one circuit of our sky is one solar day.
Which of the following is the reason for the solar day being longer than a sidereal day? -
answer- the combined effect of the rotation of Earth and its orbit about the Sun
The average length of a solar day is - answer- 24 hours.
The lunar month is longer than the sidereal month because - answer- the Moon has to
complete more than one full orbit around Earth to complete the cycle of lunar phases.
What kind of time can be read directly from a sundial? - answer- apparent solar time
All the following statements are true. Which one explains why mean solar time differs
from apparent solar time? - answer- The length of a solar day is not always exactly 24
hours.
Which of the following is the reason for the leap years? - answer- Earth year being a
non-integer number of Earth days