View Full Version : APOD: Noctilucent Clouds Over Sweden

20-07-2006, 11:49:47
http://antwrp.gsfc.nasa.gov/apod/image/0607/nlc_molten.jpgSometimes it's night on the ground but day in the air. As the Earth rotates to eclipse the Sun, sunset rises up from the ground. Therefore, at sunset on the ground, sunlight still shines on clouds above. Under usual circumstances, a pretty sunset might be visible, but unusual noctilucent clouds float so high up they can be seen well after dark. Pictured above last month, a network of noctilucent clouds cast a colorful but eerie glow after dusk near Vallentuna, Sweden. Although noctilucent clouds are thought to be composed of small ice-coated particles, much remains unknown about them. Recent evidence indicates that at least some noctilucent clouds result from freezing water exhaust from Space Shuttles. Nor really sure what it all means but is sure is a pretty picture

APOD (http://antwrp.gsfc.nasa.gov/apod/ap060718.html)

20-07-2006, 11:55:47
So nocti lucent clouds is just fancy werds for visible clouds after sunset.

Rudolph Valentuna was the famous Swedish fishy womaniser, btw.

Scabrous Birdseed
20-07-2006, 11:57:09
We had those just a few days ago. We were trying to convince our american visitor they were the northern lights.

20-07-2006, 12:02:37
I expect the eye of Sauron to peek out of those clouds any second.

20-07-2006, 16:18:01
It's the invasion of the space amoeba from MoO 2!!!!