Post by Deleted on Apr 18, 2015 12:10:31 GMT
YouTube video by lordstevenchrist:
AMAZING ANALEMMA in the Concave Earth! - YouTube
Wikipedia's entry:
en.wikipedia.org/wiki/Analemma
In astronomy, an analemma (/ˌænəˈlɛmə/; from Greek ἀνάλημμα "pedestal of a sundial") is a curve representing the changing angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as viewed from another celestial body (usually the Earth). The term is used when the observed body appears, as seen from the viewing body, to move in a way that is repeated at regular intervals, such as once a year or once a day. The analemma is then a closed curve, which does not change.
Solar analemma at wildheretic.com:
www.wildheretic.com/?s=analemma#Solar%20analemma
[...]
We can see now that the further the Sun is away from the center of the Earth cavity, the longer the solar day. This differing length of day is half responsible for the vertical figure of eight pattern that the Sun makes in the sky at noon throughout the year. This is the solar analemma.
A solar analemma graph.
The figure of eight is usually seen in a photo at a slant because the photographer didn’t take the pictures of the Sun at the exact time of solar noon and of course used a wide angle lens to accommodate both the Sun’s highest point and the horizon.
[...]
We can see now that the further the Sun is away from the center of the Earth cavity, the longer the solar day. This differing length of day is half responsible for the vertical figure of eight pattern that the Sun makes in the sky at noon throughout the year. This is the solar analemma.
A solar analemma graph.
The figure of eight is usually seen in a photo at a slant because the photographer didn’t take the pictures of the Sun at the exact time of solar noon and of course used a wide angle lens to accommodate both the Sun’s highest point and the horizon.
[...]
