On Mar 3, 2011, at 8:59 AM, Terry Blanton wrote:
http://blastr.com/2011/03/giant-chamber-on-the-moon.php
with must-see piccy.
Here is a picture that shows the lava tube:
http://parallelspirals.blogspot.com/2010/03/lava-tubes-found-on-
moon.html
http://tinyurl.com/4awbun6
"A rille system is a region on the Moon where lava flow had occured
through tubes and its roof had capsized leading to the formation of a
valley. In some regions of the Moon, these lava tubes have not
collapsed. These are believed to be natural shelters for human
colonies on the Moon. TMC data from Oceanus Procellarum (Central
Longitude: 58.3170 W / Latitude: 14.1110 N) has helped identify one
such lava tube."
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/