Difference between revisions of "January 29, 2010"
| Line 3: | Line 3: | ||
<!-- ws:start:WikiTextHeadingRule:1:<h1> --> | <!-- ws:start:WikiTextHeadingRule:1:<h1> --> | ||
<!-- ws:start:WikiTextLocalImageRule:16:<img src="/file/view/LPOD-Jan29-10.jpg/116494793/LPOD-Jan29-10.jpg" alt="" title="" /> -->[[File:LPOD-Jan29-10.jpg|LPOD-Jan29-10.jpg]]<!-- ws:end:WikiTextLocalImageRule:16 --><br /> | <!-- ws:start:WikiTextLocalImageRule:16:<img src="/file/view/LPOD-Jan29-10.jpg/116494793/LPOD-Jan29-10.jpg" alt="" title="" /> -->[[File:LPOD-Jan29-10.jpg|LPOD-Jan29-10.jpg]]<!-- ws:end:WikiTextLocalImageRule:16 --><br /> | ||
| − | <em>image by [mailto:paolo@lazzarotti-optics.com | + | <em>image by [mailto:paolo@lazzarotti-optics.com Paolo R. Lazzarotti], Massa, Italy</em><br /> |
<br /> | <br /> | ||
Gilbralter is a small knob of mainland Europe that sticks out into the passage between the Mediterranean and the Atlantic, and yet the entire strait is named for it. Thus it seems reasonable that the gap in mountains that allows lavas from maria Imbrium and Serenitatis to meet be named the Straits of Fresnel, which is the leftmost headland of the Apennine Mountains (bottom right). The exact nature of the mountain gap that allows the existence of the strait is unknown, but Paolo’s magnificent image provides some clues for speculation. The northern end of the Apennines is relatively straight - as if the mountain’s northward continuation has been sheared off. The parallel linear mountains east of the strait midpoint - Caucasus Alpha (north range) and Fresnel Theta (south range) - seem to mark the sides of the gap. Evidence for a discontinuity is provided by the truncation of the Fresnel Rilles to the south and the Theaetetus Rilles to the north of the strait. I guess that they are part of a previously continuous rille system whose middle has disappeared. Did a 60 km wide swath of mountains now occuppied by the strait sink? Is the Strait of Fresnel a wider version of the Alpine Valley? Is the giant gap in the Imbrium rim ring between the west end of the Carpathians and the Gruithuisen domes a larger version of these gaps?<br /> | Gilbralter is a small knob of mainland Europe that sticks out into the passage between the Mediterranean and the Atlantic, and yet the entire strait is named for it. Thus it seems reasonable that the gap in mountains that allows lavas from maria Imbrium and Serenitatis to meet be named the Straits of Fresnel, which is the leftmost headland of the Apennine Mountains (bottom right). The exact nature of the mountain gap that allows the existence of the strait is unknown, but Paolo’s magnificent image provides some clues for speculation. The northern end of the Apennines is relatively straight - as if the mountain’s northward continuation has been sheared off. The parallel linear mountains east of the strait midpoint - Caucasus Alpha (north range) and Fresnel Theta (south range) - seem to mark the sides of the gap. Evidence for a discontinuity is provided by the truncation of the Fresnel Rilles to the south and the Theaetetus Rilles to the north of the strait. I guess that they are part of a previously continuous rille system whose middle has disappeared. Did a 60 km wide swath of mountains now occuppied by the strait sink? Is the Strait of Fresnel a wider version of the Alpine Valley? Is the giant gap in the Imbrium rim ring between the west end of the Carpathians and the Gruithuisen domes a larger version of these gaps?<br /> | ||
<br /> | <br /> | ||
| − | <em>[mailto:tychocrater@yahoo.com | + | <em>[mailto:tychocrater@yahoo.com Chuck Wood]<br /> |
| − | This is a classic LPOD from [http://www.lpod.org/?m=20070709 | + | This is a classic LPOD from [http://www.lpod.org/?m=20070709 July 9, 2007]; More image submissions are needed!</em><br /> |
<br /> | <br /> | ||
<strong>Technical Details</strong><br /> | <strong>Technical Details</strong><br /> | ||
| Line 15: | Line 15: | ||
<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
Rükl plates [http://the-moon.wikispaces.com/R%C3%BCkl+12 12], [http://the-moon.wikispaces.com/R%C3%BCkl+13 13], [http://the-moon.wikispaces.com/R%C3%BCkl+22 22]& [http://the-moon.wikispaces.com/R%C3%BCkl+23 23] (smack in the middle of a 4-corner intersection)<br /> | Rükl plates [http://the-moon.wikispaces.com/R%C3%BCkl+12 12], [http://the-moon.wikispaces.com/R%C3%BCkl+13 13], [http://the-moon.wikispaces.com/R%C3%BCkl+22 22]& [http://the-moon.wikispaces.com/R%C3%BCkl+23 23] (smack in the middle of a 4-corner intersection)<br /> | ||
| − | Paolo's [http://www.lazzarotti-hires.com/index.php | + | Paolo's [http://www.lazzarotti-hires.com/index.php website]<br /> |
| − | The amazing [http://www.lazzarotti-optics.com/main.html | + | The amazing [http://www.lazzarotti-optics.com/main.html telescope] used for this image.<br /> |
<br /> | <br /> | ||
<hr /> | <hr /> | ||
| − | <div>You can support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=591 | + | <div>You can support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=591 LPOD!]<br /> |
</div> | </div> | ||
---- | ---- | ||
===COMMENTS?=== | ===COMMENTS?=== | ||
| − | + | Register, and click on the <b>Discussion</b> tab at the top of the page. | |
Revision as of 17:15, 11 January 2015
Straits of Fresnel
image by Paolo R. Lazzarotti, Massa, Italy
Gilbralter is a small knob of mainland Europe that sticks out into the passage between the Mediterranean and the Atlantic, and yet the entire strait is named for it. Thus it seems reasonable that the gap in mountains that allows lavas from maria Imbrium and Serenitatis to meet be named the Straits of Fresnel, which is the leftmost headland of the Apennine Mountains (bottom right). The exact nature of the mountain gap that allows the existence of the strait is unknown, but Paolo’s magnificent image provides some clues for speculation. The northern end of the Apennines is relatively straight - as if the mountain’s northward continuation has been sheared off. The parallel linear mountains east of the strait midpoint - Caucasus Alpha (north range) and Fresnel Theta (south range) - seem to mark the sides of the gap. Evidence for a discontinuity is provided by the truncation of the Fresnel Rilles to the south and the Theaetetus Rilles to the north of the strait. I guess that they are part of a previously continuous rille system whose middle has disappeared. Did a 60 km wide swath of mountains now occuppied by the strait sink? Is the Strait of Fresnel a wider version of the Alpine Valley? Is the giant gap in the Imbrium rim ring between the west end of the Carpathians and the Gruithuisen domes a larger version of these gaps?
Chuck Wood
This is a classic LPOD from July 9, 2007; More image submissions are needed!
Technical Details
24 April 2007, 19:22-26UT. Gladius CF-315 Lazzarotti telescope (f/25), Lumenera Infinity 2-1M camera, Edmund Optics R filter, 140-170 frames stacked out of 2000.
Related Links
Rükl plates 12, 13, 22& 23 (smack in the middle of a 4-corner intersection)
Paolo's website
The amazing telescope used for this image.
COMMENTS?
Register, and click on the Discussion tab at the top of the page.
