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The Moon's North Pole
The Moon's North Pole
http://www.flickr.com/photos/gsfc/61...n/photostream/ NASA image release September 7, 2011 The Earth's moon has been an endless source of fascination for humanity for thousands of years. When at last Apollo 11 landed on the moon's surface in 1969, the crew found a desolate, lifeless orb, but one which still fascinates scientist and non-scientist alike. This image of the moon's north polar region was taken by the Lunar Reconnaissance Orbiter Camera, or LROC. One of the primary scientific objectives of LROC is to identify regions of permanent shadow and near-permanent illumination. Since the start of the mission, LROC has acquired thousands of Wide Angle Camera images approaching the north pole. From these images, scientists produced this mosaic, which is composed of 983 images taken over a one month period during northern summer. This mosaic shows the pole when it is best illuminated, regions that are in shadow are candidates for permanent shadow. Image Credit: NASA/GSFC/Arizona State University |
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The Moon's North Pole
On Sep 10, 1:47*am, Sam Wormley wrote:
The Moon's North Pole * *http://www.flickr.com/photos/gsfc/61...n/photostream/ NASA image release September 7, 2011 The Earth's moon has been an endless source of fascination for humanity for thousands of years. When at last Apollo 11 landed on the moon's surface in 1969, the crew found a desolate, lifeless orb, but one which still fascinates scientist and non-scientist alike. This image of the moon's north polar region was taken by the Lunar Reconnaissance Orbiter Camera, or LROC. One of the primary scientific objectives of LROC is to identify regions of permanent shadow and near-permanent illumination. Since the start of the mission, LROC has acquired thousands of Wide Angle Camera images approaching the north pole. From these images, scientists produced this mosaic, which is composed of 983 images taken over a one month period during northern summer. This mosaic shows the pole when it is best illuminated, regions that are in shadow are candidates for permanent shadow. Image Credit: NASA/GSFC/Arizona State University A North pole assumes variations in latitudinal speeds between equatorial and polar coordinates and this is an affront to the senses as the moon does not rotate however it has a traveling axis which observers on the Earth see as the phases - http://aa.usno.navy.mil/graphics/Moon_phases.jpg There is no reason for people to behave this way,I do not condescend and assume that people can work out that the moon has orbital characteristics in its orbit of the Earth that does not include intrinsic rotation and it is not difficult at all to arrive at a stable conclusion. |
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The Moon's North Pole
On Sep 9, 6:55*pm, oriel36 wrote:
I do not condescend and assume that people can work out that the moon has orbital characteristics in its orbit of the *Earth that does not include intrinsic rotation and it is not difficult at all to arrive at a stable conclusion. The Moon has librations in longitude which are best explained by considering the Moon to have an intrinsic rotation (relative to the stars) which is constant and uniform, as measured by a mechanical clock, with both the fact of the Moon always turning the same face to us, _and_ those regular back-and-forth librations, being due to the difference between that intrinsic rotation and the Moon's orbital motion, which is not uniform, for example, because the Moon's orbit is an ellipse following Kepler's laws instead of a perfect circle. I know it seems funny to think of the Moon as "rotating" when it always shows, roughly, the same side to us, but if we decide to be slaves of "common sense", then we will end up by following Aristotle in preference to Galileo. By rebelling against Newton, that is what you are doing, even though you won't admit it - you are betraying the achievements of Galileo by refusing to follow the path that he opened. John Savard |
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The Moon's North Pole
On Sep 10, 1:47*am, Sam Wormley wrote:
The Moon's North Pole * *http://www.flickr.com/photos/gsfc/61...n/photostream/ Here is what you do Sam before you instruct students. Instead of trying to inflict a nonsensical intrinsic rotation on the moon which requires variations in latitudinal speeds,explain to them using imitation analogies why the lunar orbit of the Earth is not the same as the planetary orbit around the Sun,in short,walk around a central object while keeping the same face to it (lunar) or,using a broom to substitute for daily rotation and orientation,why a planet turns in a 360 cycle to the central Sun,something which is a 100 % observational certainty - http://astro.berkeley.edu/~imke/Infr..._2001_2005.jpg The combined effect of the orbital motions of the moon and the Earth around the Sun and the orbital motion of the moon around the Earth resolved any observed effect hence libration is not intrinsic to the motion of the moon ,but just like planetary retrogrades,are a combination of motions belonging to both the Earth and the moon in combination and as distinct motions. Have I not treated you with respect Sam ?,there are any amount of nuisances here in this forum who have lost the ability to accomplish anything other than to try an diminish readers to their own condition and level and I never much cared to engage in vitriol or bellylaughs so they are best left to their own devices.How does anyone present a formal rendering of the modification to orbital dynamics of the Earth which influences such things as the distinction between lunar and planetary orbits at a time when observers are all too quick to run to the attributes of exoplanets and assign them exotic structures,it is not that I can't compete with worthless novelties,I just don't believe that astronomers would want to.I insist that I am not hard done by even if I do retain a small sense of dismay,after all,I have spoken of an astronomer as being more human in the range of sensibilities ,keeping those things in balance and using them to good effect. |
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