Wednesday, February 2, 2011

The World at Night

A bunch of photographers have taken many, many photographs at night of the sky and the Milky way. Hence their professional name: TWAN, or The World At Night. It is a very good homepage, explaining the physical phenomenas seen on the many pictures there.

Twilight sky at 3,270 m altitude, Canary Islands.
Note the light from the city below the clouds.
"A very pedagogical picture", to quote a guide I spoke to at a Swedish museum
who included it in the exhibition.

The sun actually moves in the shape of an analemma during one year.

Many of the pictures seem to be inspired by the Daily News on National Geographic's webpage.