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Everyday, the moon rises 51 minutes later. How does that factor out degreewise? Is it 5, 10, 15 degrees higher in the sky at the same hour?

2007-04-23 17:33:10 · 4 answers · asked by MR. Tumnus 3 in Science & Mathematics Astronomy & Space

4 answers

In general, the moon moves about 13 degrees along its orbit in an average day. How high that is above the horizon depends on your latitude. Also, since the moon rises LATER each day, it will be LOWER at that same (moonrise) hour the next day. And by the same token, it sets 51 minutes later too, so that at a given moonset hour, it will be HIGHER at that same (moonset) hour the next day.

In the case of moonset on day 1, at the same hour on day 2, the moon would be roughly
13 * cos(latitude)
degrees above the horizon.

2007-04-24 02:49:48 · answer #1 · answered by Keith P 7 · 0 0

Given that the Earth rotates 360 degrees in about 23 hours and 56 minutes, that 51 minutes represents the just under 13 degrees that the moon travels per day, on average.

2007-04-24 00:44:23 · answer #2 · answered by injanier 7 · 1 0

Moon Moves Relative To Sun About Twelve Degrees Per Day, Equivalent To Fifty Minutes Of Time


The earth rotates one complete turn in 24 hours, or 360 degrees/24 degrees per hour. That's 15 degrees per hour. At that rate it will take 12/15 of an hour, or 48 minutes to "catch up" to the moon.


The moon revolves 1/30 of a complete revolution in one day, or 360 degrees/30 days which equals 12 degrees per day. Because it revolves in the same direction as earth rotates, a point on earth's surface must rotate that extra 12 degrees in order to be under the moon.
The moon "gains" about 50 minutes per day on the earth as it orbits around it once a month.

See figures to see why the angle between the moon and sun changes ...............

2007-04-24 00:57:18 · answer #3 · answered by Pam 5 · 1 0

360 degrees in (24h + 50 min) =
360 degrees / (24 5/6 hour) =
almost 14.49 degrees/hour.

Wished angle = 50 min x 14.49 degrees/hour =
12 degrees further in the sky.

Th

2007-04-24 02:21:59 · answer #4 · answered by Thermo 6 · 0 0

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