Earth Photography: It's Harder Than It Looks

http://blogs.nasa.gov/cm/blog/letter...118334979.html

Good find! Thanks!

On 2/27/12 2:29 PM, in article ,
"me" wrote:

http://blogs.nasa.gov/cm/blog/letter...118334979.html

On 2012-02-27 15:29 , me wrote:
http://blogs.nasa.gov/cm/blog/letter...118334979.html

Cool photo - for the aurora.

Also, easily identifiable is the circular Manicouagan Reservoir -
created by damming a river for hydro power (about 5000 MW in a series of
4 dams). The circle is the eroded remnant of a crater created by a
meteor impact some 200 M years ago.

--
"I was gratified to be able to answer promptly, and I did.
I said I didn't know."
-Samuel Clemens.

On Mon, 27 Feb 2012 15:29:35 -0500, me wrote:

http://blogs.nasa.gov/cm/blog/letter...118334979.html

If you like the photo, you might also enjoy The Gateway to Astronaut
Photography of Earth:

http://eol.jsc.nasa.gov/Videos/CrewE...vationsVideos/

On 2012-02-28 09:16 , RichA wrote:
On Feb 27, 3:29 pm, wrote:
http://blogs.nasa.gov/cm/blog/letter...118334979.html

NASA should be looking out, not down. They've hooked their wagon to
the global warming "cause" to justify their existence after the
discontinuation of the Shuttle program so now they monitor Earth.

Ignorance becomes you.

--
"I was gratified to be able to answer promptly, and I did.
I said I didn't know."
-Samuel Clemens.

On Tue, 28 Feb 2012 06:16:49 -0800 (PST), RichA
wrote:

On Feb 27, 3:29*pm, me wrote:
http://blogs.nasa.gov/cm/blog/letter...118334979.html

NASA should be looking out, not down. They've hooked their wagon to
the global warming "cause" to justify their existence after the
discontinuation of the Shuttle program so now they monitor Earth.

Yeah. **** science. Screw all the evidence. We all KNOW that global
warming is a hoax! It's just a coincidence that the warmest years on
history have occured since 2000. Besides, science is just a bunch of
nunmbers. Don't mean nuthin'.

Betcha can't wait to vote for Santorum.

On 2/27/2012 3:29 PM, me wrote:
http://blogs.nasa.gov/cm/blog/letter...118334979.html


Interesting. Thanks for posting.

--
Peter

On Mon, 27 Feb 2012 17:11:23 -0500, Alan Browne
wrote:
: On 2012-02-27 15:29 , me wrote:
: http://blogs.nasa.gov/cm/blog/letter...118334979.html
:
: Cool photo - for the aurora.
:
: Also, easily identifiable is the circular Manicouagan Reservoir -
: created by damming a river for hydro power (about 5000 MW in a series of
: 4 dams). The circle is the eroded remnant of a crater created by a
: meteor impact some 200 M years ago.

What made the circle lower than the surrounding ground? IOW, how did damming
the river ensure that the water would remain in the circle? Did they build an
artificial outer wall?

Bob

On Tue, 28 Feb 2012 06:16:49 -0800 (PST), RichA wrote:
: On Feb 27, 3:29*pm, me wrote:
: http://blogs.nasa.gov/cm/blog/letter...118334979.html
:
: NASA should be looking out, not down. They've hooked their wagon
: to the global warming "cause" to justify their existence after the
: discontinuation of the Shuttle program so now they monitor Earth.

Quite right. What the hell do we care what happens on Earth?

Bob

On 2012-03-01 19:15 , Robert Coe wrote:
On Mon, 27 Feb 2012 17:11:23 -0500, Alan Browne
wrote:
: On 2012-02-27 15:29 , me wrote:
: http://blogs.nasa.gov/cm/blog/letter...118334979.html
:
: Cool photo - for the aurora.
:
: Also, easily identifiable is the circular Manicouagan Reservoir -
: created by damming a river for hydro power (about 5000 MW in a series of
: 4 dams). The circle is the eroded remnant of a crater created by a
: meteor impact some 200 M years ago.

What made the circle lower than the surrounding ground? IOW, how did damming
the river ensure that the water would remain in the circle? Did they build an
artificial outer wall?

http://en.wikipedia.org/wiki/Manicouagan_Reservoir

The article on Wikipedia explains it as "an eroded crater". Since 214M
years there has been an ice age (or more), tectonic uplift, etc. as well
as plain old erosion. (Compare to Arizona's "Meteor Crater" which is
only 50,000 years old - eg: over 4,000 times older.)

No walls. AFAIK, a single dam formed the lake from the existing crater
by damming the river to the south. In terms of ROI to backup some water
for power, probably one of the best. I guess the surveyors and
engineers did a great job in picking out the site and studying its
potential.

--
"I was gratified to be able to answer promptly, and I did.
I said I didn't know."
-Samuel Clemens.