11/29: Upper Tangent Arc

Undertoad · 11-29-2001, 12:03 PM

This is another solar phenomenon that is not aliens. It's called an "upper tangent arc". It happens when "cirrus clouds contain columnar ice crystals aligned so that their axes are all in a horizontal direction". Got it.

This is always about 22 degrees away from the Sun itself. This particular image also has a bit of "sun pillar" which was an iotd a few days ago.

11-29-2001, 01:00 PM

I can honestly say that I've never seen one of those

but I'd really like to see a sun pillar. That would be cool.

Honestly though... the Northern Lights are about the coolest looking things ever

warch · 11-30-2001, 10:02 AM

The northern lights have been really active and gorgeously glowy this fall around here- (MN) then those Leonids- How cool was that?! (pretty damn cool)

11-30-2001, 10:03 AM

Lucky you. I'd kill my mother to see them. Not really. But still. Wow. Being down in Virginia though...

warch · 11-30-2001, 10:17 AM

Until this year I had never really seen anything too dramatic- sun dogs, a few greeny gold streaks, a bit of a ripple to the north. But this past Oct, my neighbor wrangled our block outside and it was red and pulsing- Waaahhh

Makes me want to roadtrip even further north- Flin Flon?

11-30-2001, 10:20 AM

Word has it that anything in Alaska is pretty spectacular. I have some bookmarked sites at home with some really awesome pictures that I'll post some time. Man. Amazing.

elSicomoro · 11-30-2001, 04:46 PM

This site has some great pics of the Northern Lights.

11-30-2001, 04:56 PM

Quote:

Originally posted by sycamore
This site has some great pics of the Northern Lights.

Error 403 - Forbidden

serge · 12-01-2001, 07:49 PM

Quote:

Originally posted by dhamsaic

Error 403 - Forbidden

Google is your friend.

elSicomoro · 12-01-2001, 09:18 PM

Quote:

Originally posted by dhamsaic

Error 403 - Forbidden

*shrugs* It works for me...

11-29-2001, 12:03 PM	#1
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	11/29: Upper Tangent Arc This is another solar phenomenon that is not aliens. It's called an "upper tangent arc". It happens when "cirrus clouds contain columnar ice crystals aligned so that their axes are all in a horizontal direction". Got it. This is always about 22 degrees away from the Sun itself. This particular image also has a bit of "sun pillar" which was an iotd a few days ago.

11-29-2001, 01:00 PM	#2
dave Guest Posts: n/a	I can honestly say that I've never seen one of those but I'd really like to see a sun pillar. That would be cool. Honestly though... the Northern Lights are about the coolest looking things ever

11-30-2001, 10:02 AM	#3
warch lurkin old school Join Date: Oct 2001 Location: Minnesota Posts: 2,796	The northern lights have been really active and gorgeously glowy this fall around here- (MN) then those Leonids- How cool was that?! (pretty damn cool)

11-30-2001, 10:03 AM	#4
dave Guest Posts: n/a	Lucky you. I'd kill my mother to see them. Not really. But still. Wow. Being down in Virginia though...

11-30-2001, 10:17 AM	#5
warch lurkin old school Join Date: Oct 2001 Location: Minnesota Posts: 2,796	Until this year I had never really seen anything too dramatic- sun dogs, a few greeny gold streaks, a bit of a ripple to the north. But this past Oct, my neighbor wrangled our block outside and it was red and pulsing- Waaahhh Makes me want to roadtrip even further north- Flin Flon?

11-30-2001, 10:20 AM	#6
dave Guest Posts: n/a	Word has it that anything in Alaska is pretty spectacular. I have some bookmarked sites at home with some really awesome pictures that I'll post some time. Man. Amazing.

11-30-2001, 04:46 PM	#7
elSicomoro Person who doesn't update the user title Join Date: Jan 2001 Posts: 12,486	This site has some great pics of the Northern Lights.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)