Difference between revisions of "October 20, 2012"
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=No Longer Straight= | =No Longer Straight= | ||
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| − | <em>image by [http://wms.selene.jaxa.jp/selene_viewer/jpn/observation_mission/tc/tc_043.html JAXA-Kaguya Image Gallery] with inset from [http://www.lpod.org/archive/LPOD-2005-04-13.htm Zac Pujic]</em><br /> | + | <em>image by [http://wms.selene.jaxa.jp/selene_viewer/jpn/observation_mission/tc/tc_043.html" rel="nofollow JAXA-Kaguya Image Gallery] with inset from [http://www.lpod.org/archive/LPOD-2005-04-13.htm" rel="nofollow Zac Pujic]</em><br /> |
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One of the most common subjects for futurist drawings of the Moon before the space age was the Straight Wall - and here we finally see an image with a similar<br /> | One of the most common subjects for futurist drawings of the Moon before the space age was the Straight Wall - and here we finally see an image with a similar<br /> | ||
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in profile at upper right. I must admit some disappointment - I had pictured the Wall having more of a clean slope with a sharp edge at the top. But it is like 3.5<br /> | in profile at upper right. I must admit some disappointment - I had pictured the Wall having more of a clean slope with a sharp edge at the top. But it is like 3.5<br /> | ||
billion year old crater rims, worn to a roundness by uncountable small impacts and seismic shakes. The nearest section of the Wall seems less steep than more<br /> | billion year old crater rims, worn to a roundness by uncountable small impacts and seismic shakes. The nearest section of the Wall seems less steep than more<br /> | ||
| − | distant parts, where according to work of [http://digidownload.libero.it/glrgroup/selenologytoday10.pdf GLR] (pdf. p 41), the maximum height is almost 500 m and the slope reaches 21°. The nick at point 2 in the inset appears <br /> | + | distant parts, where according to work of [http://digidownload.libero.it/glrgroup/selenologytoday10.pdf" rel="nofollow GLR] (pdf. p 41), the maximum height is almost 500 m and the slope reaches 21°. The nick at point 2 in the inset appears <br /> |
on the Kaguya image to be an old crater; from Earth-based images it appeared more like a sloping ridge along the front of the Wall. This view also suggests a relatively <br /> | on the Kaguya image to be an old crater; from Earth-based images it appeared more like a sloping ridge along the front of the Wall. This view also suggests a relatively <br /> | ||
straight tonal boundary that parallels the scarp to the right of it - I don't know if it is real nor what it might be. Finally, the mountains at the upper left horizon make up <br /> | straight tonal boundary that parallels the scarp to the right of it - I don't know if it is real nor what it might be. Finally, the mountains at the upper left horizon make up <br /> | ||
| − | the cross guard of the sword handle in the [http://www.skyandtelescope.com/observing/objects/moon/3304161.html sword] that Huygen's compared the Straight Wall to.<br /> | + | the cross guard of the sword handle in the [http://www.skyandtelescope.com/observing/objects/moon/3304161.html" rel="nofollow sword] that Huygen's compared the Straight Wall to.<br /> |
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| − | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | + | <em>[mailto:tychocrater@yahoo.com" rel="nofollow Chuck Wood]</em><br /> |
This is a classic LPOD form [http://lpod.wikispaces.com/November+13%2C+2009 Nov 13, 2009]<br /> | This is a classic LPOD form [http://lpod.wikispaces.com/November+13%2C+2009 Nov 13, 2009]<br /> | ||
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+54 54]<br /> | Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+54 54]<br /> | ||
| − | A higher angle, but still oblique [http://www.lpod.org/archive/LPOD-2004-07-30.htm view].<br /> | + | A higher angle, but still oblique [http://www.lpod.org/archive/LPOD-2004-07-30.htm" rel="nofollow view].<br /> |
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<hr /> | <hr /> | ||
Revision as of 21:37, 4 January 2015
No Longer Straight
image by " rel="nofollow JAXA-Kaguya Image Gallery with inset from " rel="nofollow Zac Pujic
One of the most common subjects for futurist drawings of the Moon before the space age was the Straight Wall - and here we finally see an image with a similar
perspective. And what a view it is, with the Wall, not quite so straight, stretching nearly to the horizon, with the bright-rimmed crater Birt (B on inset) seen nearly
in profile at upper right. I must admit some disappointment - I had pictured the Wall having more of a clean slope with a sharp edge at the top. But it is like 3.5
billion year old crater rims, worn to a roundness by uncountable small impacts and seismic shakes. The nearest section of the Wall seems less steep than more
distant parts, where according to work of " rel="nofollow GLR (pdf. p 41), the maximum height is almost 500 m and the slope reaches 21°. The nick at point 2 in the inset appears
on the Kaguya image to be an old crater; from Earth-based images it appeared more like a sloping ridge along the front of the Wall. This view also suggests a relatively
straight tonal boundary that parallels the scarp to the right of it - I don't know if it is real nor what it might be. Finally, the mountains at the upper left horizon make up
the cross guard of the sword handle in the " rel="nofollow sword that Huygen's compared the Straight Wall to.
" rel="nofollow Chuck Wood
This is a classic LPOD form Nov 13, 2009
Technical Details
I assume this view was achieved by using stereo images from Kaguya's Terrain Camera to construct a digital terrain map. The map, with the image draped over it,
was then viewed from the north looking southward down the fault.
Related Links
Rükl plate 54
A higher angle, but still oblique " rel="nofollow view.
