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| − | =Keeping Up with the Smythiis= | + | =Keeping up with the Smythiis= |
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| + | <p>[[File:LPOD-Smythii.jpg|Smythii twins]]<br /> |
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| − | <div class="storycontent"> | |
| − | <p>[[File:LPOD-Smythii.jpg|Smythii twins]]<br /> | |
| | <em>image by [mailto:elyx69@libero.it Gerardo Sbarufatti] (top) and [mailto:tcvweb@hotmail.com Tom Bash] (bottom)</em></p> | | <em>image by [mailto:elyx69@libero.it Gerardo Sbarufatti] (top) and [mailto:tcvweb@hotmail.com Tom Bash] (bottom)</em></p> |
| | <p>Impact basins are typically round depressions full of lava. Except often you can’t easily recognize the lava and the hole at the same time. That is often true for Smythii - either the mare is visible (top image) or, if you are lucky, the topography is (bottom image). Gerardo’s excellent high Sun view shows the differences in brightness of the mare, which are due to differences in age, composition and dusting by highland ejecta. Tom’s excellent low Sun image shows a long curved shadow cast by the basin rim, which rises a surprising 5 km above the center of the basin floor. I have only observed this rim shadow twice and was pleased both times to see evidence for the rim. On the high-Sun image, there is additional evidence for the rim - the far rim of the basin is visible, making a roughness on the horizon.</p> | | <p>Impact basins are typically round depressions full of lava. Except often you can’t easily recognize the lava and the hole at the same time. That is often true for Smythii - either the mare is visible (top image) or, if you are lucky, the topography is (bottom image). Gerardo’s excellent high Sun view shows the differences in brightness of the mare, which are due to differences in age, composition and dusting by highland ejecta. Tom’s excellent low Sun image shows a long curved shadow cast by the basin rim, which rises a surprising 5 km above the center of the basin floor. I have only observed this rim shadow twice and was pleased both times to see evidence for the rim. On the high-Sun image, there is additional evidence for the rim - the far rim of the basin is visible, making a roughness on the horizon.</p> |
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| | [http://home.ptd.net/~tbash/ Tom’s website]<br /> | | [http://home.ptd.net/~tbash/ Tom’s website]<br /> |
| | [http://www.astrofili.com/ Gerardo’s website]</p> | | [http://www.astrofili.com/ Gerardo’s website]</p> |
| − | <p align="center"><b>SUPPORT LPOD - VISIT A SPONSOR (CLICK AN AD BELOW)! </b><br /> | + | <p><b>Yesterday's LPOD:</b> [[April 3, 2006|Atlas Alone]] </p> |
| − | <i>Now you can also support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=102 LPOD!]</i></p> | + | <p><b>Tomorrow's LPOD:</b> [[April 5, 2006|LPOD Needs Your Images!]] </p> |
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| + | <p> </p> |
| − | | + | <p> </p> |
| − | ---- | + | <p> </p> |
| − | ===COMMENTS?===
| + | <!-- End of content --> |
| − | Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment.
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