About how many days must elapse between the first-quarter moon and the next new
ID: 106779 • Letter: A
Question
About how many days must elapse between the first-quarter moon and the next new moon?
When does the third quarter phase moon rise?
If two stars differ in brightness by 6.7 magnitudes, what is the flux ratio of the brighter to the less bright star?
north celestial pole and south celestial pole vernal equinox and autumnal equinox summer solstice and winter solstice north and south celestial poles and vernal and autumnal equinoxes All of these choices are correct.About how many days must elapse between the first-quarter moon and the next new moon?
28 7 21 365 14When does the third quarter phase moon rise?
midnight sunrise noon sunset There is no way to predict the time that a particular phase rises.If two stars differ in brightness by 6.7 magnitudes, what is the flux ratio of the brighter to the less bright star?
383 to 1 96 to 1 479 to 1 287 to 1 574 to 1 PrecessionExplanation / Answer
1) All of the above choices are correct.
The precession of the earth's rotational axis causes the location of the North celestial Pole and South celestial pole,Vernal Equinox and Autumnal Equinox,summer Solstice and winter Solstice.
2)Ans : 7.
About 7 days from first quarter moon to new moon day.Total 29.5 days from new moon day to new moon day.Hence from new moon day to full moon day it takes 12 days.Hence from first quarter moon to new moon it takes approxiately 7 days.
3)At third quarter the moon rises at mid night and sets at sunrise. Ans is midnight.
4)flux ratio:
= ( percentage difference in brigtness between two stars)difference of the magnitude.
=(2.512)6.7
= 478.77
= 479 to 1
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