|
Collection:
|
|
NASA Astronomy Picture of the Day Collection
Collection
NASA Astronomy Picture of the Day Collection
Collection
|
|
Title:
|
|
The Analemma and the Temple of Olympian Zeus
Title
The Analemma and the Temple of Olympian Zeus
Title
|
|
Explanation:
|
An analemma [ http://www.analemma…] is that figure-8 curve you get when you mark the position [ http://www.twigsdig…] of the Sun at the same time each day throughout planet [ http://antwrp.gsfc.…] Earth's year. Above, 47 separate exposures [ http://www.perseus.…] (plus one foreground exposure) were recorded on a single piece of film to illustrate this annual cycle of solar motion from March 30, 2003 to March 30, 2004. In the remarkable foreground are standing Corinthian columns of the ancient Temple of Olympian Zeus [ http://en.wikipedia…Temple_of_Olympian_Z eus_(Athens) ] in Athens, Greece. Solstices [ http://www.archaeoa…index.shtml ], like the one that occurred [ http://aa.usno.navy…EarthSeasons.html ] at 0022 UT on December 22, correspond to the bottom of the figure-8 or the southernmost excursion of the Sun in the sky. The tilt of planet Earth's axis and the variation in speed as it moves around its orbit combine to produce the graceful analemma curve [ http://www.analemma…].
Explanation
An analemma [ http://www.analemma…] is that figure-8 curve you get when you mark the position [ http://www.twigsdig…] of the Sun at the same time each day throughout planet [ http://antwrp.gsfc.…] Earth's year. Above, 47 separate exposures [ http://www.perseus.…] (plus one foreground exposure) were recorded on a single piece of film to illustrate this annual cycle of solar motion from March 30, 2003 to March 30, 2004. In the remarkable foreground are standing Corinthian columns of the ancient Temple of Olympian Zeus [ http://en.wikipedia…Temple_of_Olympian_Z eus_(Athens) ] in Athens, Greece. Solstices [ http://www.archaeoa…index.shtml ], like the one that occurred [ http://aa.usno.navy…EarthSeasons.html ] at 0022 UT on December 22, correspond to the bottom of the figure-8 or the southernmost excursion of the Sun in the sky. The tilt of planet Earth's axis and the variation in speed as it moves around its orbit combine to produce the graceful analemma curve [ http://www.analemma…]. Explanation
|
|
Credit and Copyright:
|
Credit_and_Copyright
Credit and Copyright
|
|
facet_when:
|
|
March 30, 2003
facet_when
March 30, 2003
facet_when
|
|
facet_when:
|
|
March 30, 2004
facet_when
March 30, 2004
facet_when
|
|
facet_where:
|
|
Athens
facet_where
Athens
facet_where
|
|
facet_where:
|
|
Greece
facet_where
Greece
facet_where
|
|
facet_where:
|
|
Goddard Space Flight Center (GSFC)
facet_where
Goddard Space Flight Center (GSFC)
facet_where
|
|
facet_where:
|
|
Washington, D.C.
facet_where
Washington, D.C.
facet_where
|
|
facet_what:
|
|
Earth
facet_what
Earth
facet_what
|
|
facet_what:
|
|
Sun
facet_what
Sun
facet_what
|
|
facet_what:
|
|
Perseus
facet_what
Perseus
facet_what
|
|
facet_when_year:
|
|
2003
facet_when_year
2003
facet_when_year
|
|
facet_when_year:
|
|
2004
facet_when_year
2004
facet_when_year
|
|
original url:
|
original_url
original url
|
|
UID:
|
|
SPD-APOD-ap061223
UID
SPD-APOD-ap061223
UID
|
