Auroras (APOD 15 July 2007)

FieryIce · Post by **FieryIce** » Mon Jul 16, 2007 4:51 pm

APOD was down for some time over this last weekend so using some links suggested by Asterick posters the Spanish mirror site has the missing Pod’s. This one for the 15th is interesting since the discussion recently has been about NLC’s (NoctiLucent clouds). The altitude of auroras is 50 km to as high as 500 km and NLC’s are at an altitude of 50 to 85 km. Aurora’s are supposed to be the result of charged particles whereas NLC’s are ice crystals or moisture covering a dust particle. Logically it would seem there would be a relationship between these two phenomena since they occupy overlapping altitudes. Aurora’s occur in northern and southern hemispheres where they are called Aurora borealis (Artic) and Aurora australis (Antarctic) wouldn’t NLC’s occur in both hemispheres also?

Aurora
APOD mirror site
July 15, 2007 APOD from mirror site
Don Pettit’s Aurora page
Don Pettit’s NLC from ISS page
Aurora FAO

BMAONE23 · Post by **BMAONE23** » Mon Jul 16, 2007 8:28 pm

Nice image!!!
The MANICOUAGAN CRATER really shows up well all iced over http://www.unb.ca/passc/ImpactDatabase/ ... ouagan.htm

makc · Post by **makc** » Mon Jul 16, 2007 9:58 pm

FieryIce wrote:the Spanish mirror site has the missing Pod’s.

es, and I wonder how come. They could have direct database connection, so that web server problems would not affect them; or, they could simply pick random past image.

makc · Post by **makc** » Tue Jul 17, 2007 9:16 am

oh look, they have patched apod to show same images.

Sudhamshu · Post by **Sudhamshu** » Tue Jul 17, 2007 12:23 pm

Isn't this image being repeated?
I do remember seeing it a few months back along with the same description, I could tell what was written without even reading it.(or is it a Deja vu?)

Sudhamshu · Post by **Sudhamshu** » Tue Jul 17, 2007 12:26 pm

There i found the original one

Starship Asterisk*

Auroras (APOD 15 July 2007)

Auroras (APOD 15 July 2007)

Re: July 15, 2007, Auroras