3/31/2003: Shimmer of the Earth

Undertoad · 03-31-2003, 01:53 PM

Not much to say about this, another NASA pic via MSNBC pic of the week. The green bits are aurora, but the most interesting thing to me is the round circle at the bottom. That's a crater, and it turns out to be such an important crater that it has a name: the Manicouagan Crater. It's in northern Canada, and it's one of the oldest impact craters known on the Earth, formed about 200 million years ago.

Riddil · 03-31-2003, 02:54 PM

Oh c'mon, you honestly don't believe all that "shimmer" stuff, do you?

That's obviously a picture of our new planetary force shield, designed to protect us against the invading alien hordes.

Damn gov't coverups can fool everybody... except ME!

Uryoces · 03-31-2003, 03:06 PM

Ah, the silence! Nothing but oxygen molecules softly fluorescing, humming genly.

Elspode · 03-31-2003, 03:35 PM

Another damn fine pic, UT. How do you find all these? And I even *try* to stay up to the minute on science and astro stuff...

Manicouagan is rare because plate tectonics tend to consume impact scars on Earth. Manicouagan is a big lake (the perimeter, anyway...the center is uplifted as a result of the impact rebound forces), I believe, and wasn't even recognized as an impact crater until relatively recently, like a couple of decades or so back, because it is so damn big.

For some reason, your IOTDs today are bringing up geological stuff I've read and stored away in the Trivial pursuit portion of my brain...

Undertoad · 03-31-2003, 03:51 PM

It's my job, sir! Coming this week will be Yet Another astro image that will blow yer mind. It blew mine.

xoxoxoBruce · 03-31-2003, 05:04 PM

Maybe that's Reagans "Star Wars" shield.

Katkeeper · 03-31-2003, 05:55 PM

I have to reveal the truth - Undertoad has geology genes...

Bitman · 03-31-2003, 10:13 PM

Quote:

Originally posted by Riddil
That's obviously a picture of our new planetary force shield, designed to protect us against the invading alien hordes.

You're not far off .. the Earth really does have an electromagnetic shield protecting the atmosphere. It's only good for deflecting 'wind' from the Sun, but it's there.

Elspode · 03-31-2003, 10:32 PM

All in all, solar radiation is probably a lot more deadly to us than attack from an alien species, if you average it out over millions of years.

Bitmap · 04-01-2003, 11:35 AM

The ring of <a href="http://www.space.com/spacewatch/space_junk_list.html">garbage</a>[space.com] that we've left up there keeps us plenty protected from unwanted aliens. And endangers our space men every time they walk.

03-31-2003, 01:53 PM	#1
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	3/31/2003: Shimmer of the Earth Not much to say about this, another NASA pic via MSNBC pic of the week. The green bits are aurora, but the most interesting thing to me is the round circle at the bottom. That's a crater, and it turns out to be such an important crater that it has a name: the Manicouagan Crater. It's in northern Canada, and it's one of the oldest impact craters known on the Earth, formed about 200 million years ago.

03-31-2003, 03:06 PM	#3
Uryoces 2nd Covenant, yo Join Date: Dec 2002 Location: Pugetropolis Posts: 583	Ah, the silence! Nothing but oxygen molecules softly fluorescing, humming genly. __________________ The party's over ... the drink ... and the luck ... ran out.

03-31-2003, 03:35 PM	#4
Elspode When Do I Get Virtual Unreality? Join Date: Dec 2002 Location: Raytown, Missouri Posts: 12,719	Another damn fine pic, UT. How do you find all these? And I even try to stay up to the minute on science and astro stuff... Manicouagan is rare because plate tectonics tend to consume impact scars on Earth. Manicouagan is a big lake (the perimeter, anyway...the center is uplifted as a result of the impact rebound forces), I believe, and wasn't even recognized as an impact crater until relatively recently, like a couple of decades or so back, because it is so damn big. For some reason, your IOTDs today are bringing up geological stuff I've read and stored away in the Trivial pursuit portion of my brain... __________________ "To those of you who are wearing ties, I think my dad would appreciate it if you took them off." - Robert Moog

03-31-2003, 10:32 PM	#9
Elspode When Do I Get Virtual Unreality? Join Date: Dec 2002 Location: Raytown, Missouri Posts: 12,719	All in all, solar radiation is probably a lot more deadly to us than attack from an alien species, if you average it out over millions of years. __________________ "To those of you who are wearing ties, I think my dad would appreciate it if you took them off." - Robert Moog

04-01-2003, 11:35 AM	#10
Bitmap Look who thinks he's clever Dan. Join Date: Feb 2003 Location: Washington DC Metro Area. Fairfax city Posts: 226	we don't need an energy shield... The ring of <a href="http://www.space.com/spacewatch/space_junk_list.html">garbage</a>[space.com] that we've left up there keeps us plenty protected from unwanted aliens. And endangers our space men every time they walk.

03-31-2003, 02:54 PM	#2
Riddil Management Consultant Join Date: Aug 2002 Posts: 165	Oh c'mon, you honestly don't believe all that "shimmer" stuff, do you? That's obviously a picture of our new planetary force shield, designed to protect us against the invading alien hordes. Damn gov't coverups can fool everybody... except ME!

03-31-2003, 03:51 PM	#5
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	It's my job, sir! Coming this week will be Yet Another astro image that will blow yer mind. It blew mine.

03-31-2003, 05:04 PM	#6
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	Maybe that's Reagans "Star Wars" shield.

03-31-2003, 05:55 PM	#7
Katkeeper Hoodoo Guru Join Date: Jun 2001 Location: Mechanicsburg PA Posts: 296	I have to reveal the truth - Undertoad has geology genes...

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