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Астронет: Астрономическая картинка дня Солнечные часы показывают солнцестояние http://www.variable-stars.ru/db/msg/1384780/eng |
Credit & Copyright: Jean-Marc Mari
Explanation:
What day is it?
If the day -- and time -- are right, this sundial will tell you:
SOLSTICE.
Only then will our
Sun
be located just right for sunlight to
stream through openings and spell
out the term for the
longest and shortest days of the year.
But this will happen today (and again in December).
The
sundial
was constructed by Jean Salins in 1980 and is
situated at the
Ecole SupИrieure des Mines
de Paris in
Valbonne Sophia Antipolis of
south-eastern
France.
On two other days of the year,
watchers of
this sundial
might get to see it produce another word:
EQUINOXE.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.