Difference between revisions of "November 25, 2012"
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<em>image by [mailto:raffaele.barzacchi@gmail.com Raffaele Barzacchi], Italy</em><br /> | <em>image by [mailto:raffaele.barzacchi@gmail.com Raffaele Barzacchi], Italy</em><br /> | ||
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| − | Kepler's rays would find more admirers if they were not so near the long and glorious Copernicus rays and the brighter ones from Aristarchus. | + | Kepler's rays would find more admirers if they were not so near the long and glorious Copernicus rays and the brighter ones from Aristarchus. |
| − | Raf's images emphasize a feature of Kepler's ejecta that I have noticed often but not thought enough about. An area extending out about 1.5 to | + | Raf's images emphasize a feature of Kepler's ejecta that I have noticed often but not thought enough about. An area extending out about 1.5 to |
| − | 2 times Kepler's diameter (inner dark outline in negative image) is covered with bright ray-like material. Surrounding that is another | + | 2 times Kepler's diameter (inner dark outline in negative image) is covered with bright ray-like material. Surrounding that is another discontinuously covered and not as bright annulus (larger black outline). The boundary of this area on the west is where broad swaths of Kepler's rays |
| − | + | seem truncated, extending only as narrow rays beyond. The inner bright zone is continuously covered by ejecta; the outer area must be discontinuously draped with ejecta. An interesting thing about the outer area is that it is bounded on the west by a narrow fringe of dark lava. It is unlikely | |
| − | seem truncated, extending only as narrow rays beyond. The inner bright zone is continuously covered by ejecta; the outer area must be | + | that ejecta could effect the path of lava or be affected by it. It is possible that the outer zone of brightness is not real, that there seems to be a |
| − | + | boundary only because of a chance ribbon of lava that separates equally bright material on either side. What do you think? | |
| − | that ejecta could effect the path of lava or be affected by it. It is possible that the outer zone of brightness is not real, that there seems to be a | + | <br /> |
| − | boundary only because of a chance ribbon of lava that separates equally bright material on either side. What do you think? <br /> | ||
<br /> | <br /> | ||
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | ||
<br /> | <br /> | ||
<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | Rükl plate [ | + | Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_30 30]<br /> |
| − | <em>[ | + | <em>[[21st Century Atlas of the Moon|21st Century Atlas]]</em> chart 22.<br /> |
<br /> | <br /> | ||
| + | <p><b>Yesterday's LPOD:</b> [[November 24, 2012|How Old is This Crater?]] </p> | ||
| + | <p><b>Tomorrow's LPOD:</b> [[November 26, 2012|Fish Scales]] </p> | ||
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Latest revision as of 07:34, 28 October 2018
Areas of Confusion
image by Raffaele Barzacchi, Italy
Kepler's rays would find more admirers if they were not so near the long and glorious Copernicus rays and the brighter ones from Aristarchus.
Raf's images emphasize a feature of Kepler's ejecta that I have noticed often but not thought enough about. An area extending out about 1.5 to
2 times Kepler's diameter (inner dark outline in negative image) is covered with bright ray-like material. Surrounding that is another discontinuously covered and not as bright annulus (larger black outline). The boundary of this area on the west is where broad swaths of Kepler's rays
seem truncated, extending only as narrow rays beyond. The inner bright zone is continuously covered by ejecta; the outer area must be discontinuously draped with ejecta. An interesting thing about the outer area is that it is bounded on the west by a narrow fringe of dark lava. It is unlikely
that ejecta could effect the path of lava or be affected by it. It is possible that the outer zone of brightness is not real, that there seems to be a
boundary only because of a chance ribbon of lava that separates equally bright material on either side. What do you think?
Chuck Wood
Related Links
Rükl plate 30
21st Century Atlas chart 22.
Yesterday's LPOD: How Old is This Crater?
Tomorrow's LPOD: Fish Scales
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