Guest dave123 Posted September 12, 2004 Share Posted September 12, 2004 why does the moonrise and moonset time change each day? please post a link or explain perferrably in detail. Link to comment Share on other sites More sharing options...
ydoaPs Posted September 13, 2004 Share Posted September 13, 2004 the Earth spins. Link to comment Share on other sites More sharing options...
jordan Posted September 13, 2004 Share Posted September 13, 2004 Or how about the tilt of the Earth's axis. If the Earth just spun in a circle, sunrise and sunset would be at the exact same time every day. But since the Earth's axis is tilted, you move up and down latitudes and thus pass into the lit half and the dark half of the Earth at varying times. Note: I am assuming there are no hidden variables that make the moon different than the sun in this case. Link to comment Share on other sites More sharing options...
ydoaPs Posted September 13, 2004 Share Posted September 13, 2004 oops, didn't read the whole question. sorry. what jordan said Link to comment Share on other sites More sharing options...
Teotihuacan Posted September 13, 2004 Share Posted September 13, 2004 What about the fact that the Moon orbits the Earth every 28 days, in essentially the same plane (ecliptic). That is a Difference of 24*60/28 = 51 min. 26 sec. each day. Another way to verify this is to go to the seashore for a week, and dip your toes into the ocean at the same place & time each day. You will walk farther or shorter each day, but the increment of change will always be the same. The differential between the periods of rotation. Link to comment Share on other sites More sharing options...
ydoaPs Posted September 13, 2004 Share Posted September 13, 2004 the moon's orbit has almost no eccentricy. it is almost a perfect circle. Link to comment Share on other sites More sharing options...
Thales Posted September 13, 2004 Share Posted September 13, 2004 Interesting though it is moving away from us, slowing the earths rotation as it does so via conservation of angular momentum. Link to comment Share on other sites More sharing options...
swansont Posted September 13, 2004 Share Posted September 13, 2004 What about the fact that the Moon orbits the Earth every 28 days, in essentially the same plane (ecliptic) But there's enough inclination (about 5 degrees) that we don't get an eclipse every new/full moon. Link to comment Share on other sites More sharing options...
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