Question : Axial precession is sometimes called the precession of equinoxes because : 2146897
44) Axial precession is sometimes called the precession of equinoxes because it results in a gradual shift, relative to the celestial background, of the position where the Sun crosses the celestial equator at the equinox. Astrology is a mythology based on things like your "sign" which refers to the position of the Sun in the celestial zodiac (the 12 constellations along the ecliptic) on your birthday. This system was established almost two thousand years ago. If this mythology were true (and you believe your horoscope) can you use the dates for your "sign" based on this 2000 year old system?
A) Yes, any changes are insignificant in 2000 years.
B) No, because 2000 years is almost 1/12, or one full sign shift, in the zodiac, so the 2000 year old signs are off by almost one full sign.
C) Yes, the dates are fixed; your sign is your sign.
D) No, although the precession shifts the equinox position, the other zodiac positions do not change because they are fixed to the celestial sphere.
45) If you determine the number of days in a year with solar time and sidereal time how would they vary?
A) A year measured in sidereal time would be about one day longer than a year based on solar time.
B) A year measured in sidereal time would be about 15 minutes different than a solar day, so the difference only accumulates over time.
C) They wouldn't; a year is always about 365 1/4 days, and the 1/4 day is taken up with leap years.
D) A year measured in sidereal time would be about one day shorter than a year based on solar time.
46) The 5000 year old Stonehenge stone circle of Salisbury Plains, England, allows light shafts to come straight between two rocks on ________ in the Northern hemisphere.
A) spring equinox
B) winter solstice
C) fall equinox
D) summer solstice
47) The length of daylight on the Moon is about ________.
A) 48 hours
B) two weeks
C) 24 hours
D) one year
E) one month
48) The period of time required for the Moon to complete a cycle of phases is called the ________ month.
D) sidereal E) Julian
49) Relative to the celestial background, the Moon moves ________.
A) south to north
B) east to west
C) west to east
D) southeast to northwest
50) When the Moon appears as a thin crescent in the evening sky, just after Sunset, the lunar phase is ________.
A) between first and second quarter
B) new Moon
C) between second and third quarter
D) between new Moon and first quarter
51) At first quarter it is approximately ________ week(s) until the new Moon.
52) A total eclipse of the Sun is only possible at ________.
A) third quarter
B) first quarter
C) second quarter
D) new Moon
53) During a total lunar eclipse, the Moon remains visible because ________.
A) the atmosphere of the Moon diffuses light from the other side of the Moon
B) the atmosphere of the Earth refracts light around its perimeter
C) the earth is too far from the Moon to totally cover the solar disk
D) None of the above; the Moon completely disappears against the night sky.