Dave:
That fits with the link Richard sent. There are two images at that website. One shows a shadow like I saw last night (http://legault.club.fr/wall_w.html), which makes it look like a ridge. The other image at the link shows it filled with sunlight, which makes it look like a valley.
Very cool feature though.
Bill
Dave Staples <dave.staples@No-Spam> wrote:
Rupes Recta is also known as the straight wall. It is a linear fault about 110km long, 2-3km wide and 240-300m high. The shadows make it look like a steep cliff, in reality it is more of a slope with a 10% to 15% grade.
Cheers,
Dave
-----Original Message-----
From: sf-bay-tac-bounces@No-Spam [mailto:sf-bay-tac-bounces@No-Spam] On Behalf Of Gator Chaser
Sent: Thursday, January 17, 2008 9:53 PM
To: TAC
Subject: [TAC] OR: Waxing Gibbous Moon
Like Carol, I too am out observing the moon. Only from Orange County. The skies here are perfectly clear and surprisingly crisp considering the winds we've had.
I set up my 8" LX200GPS in my folks backyard tonight and showed my 78 year old father a few of the sky's brighter objects:
M42
Mars
Moon
NGC457
M45
Double Cluster
Turns out that M45 is right next to the moon, so we couldn't see too many stars. He enjoyed looking at everything.
The moon was most interesting though. For the first time I noticed a dark line on the surface. According to my Field Guide the object is in Mare Nubium. It is listed as "Rupes Recta." It was a clear and well defined dark line. Must be a ridge or something similar.
Anyway, that's about it for tonight.
Regards,
Bill Drelling, Observing on Location in Orange County, CA.
---------------------------------
Looking for last minute shopping deals? Find them fast with Yahoo! Search.
--
GSSP 2008 registration is open. http://www.goldenstatestarparty.org
TAC-Wiki is your's, build it: http://observers.org/wiki/doku.php/faq
Change your mail prefs?: http://seds.org/mailman/listinfo/sf-bay-tac
--
GSSP 2008 registration is open. http://www.goldenstatestarparty.org
TAC-Wiki is your's, build it: http://observers.org/wiki/doku.php/faq
Change your mail prefs?: http://seds.org/mailman/listinfo/sf-bay-tac
---------------------------------
Looking for last minute shopping deals? Find them fast with Yahoo! Search.
--
GSSP 2008 registration is open. http://www.goldenstatestarparty.org
TAC-Wiki is your's, build it: http://observers.org/wiki/doku.php/faq
Change your mail prefs?: http://seds.org/mailman/listinfo/sf-bay-tac
Received on Fri Jan 18 08:50:54 2008