In nice condition and is compete.
Used by ancient Greek and Chinese astronomers to compute star coordinates, sunrise/sunset times, and seasonal changes.
An
armillary sphere
is a model of
objects
in the sky (on the
celestial sphere
), consisting of a spherical framework of
rings
, centered on
Earth
or the
Sun
, that represent lines of
celestial longitude and latitude
and other astronomically important features, such as the
ecliptic
. As such, it differs from a
celestial globe
, which is a smooth sphere whose principal purpose is to map the
constellations
. It was invented separately, in
ancient China
possibly as early as the 4th century BC and
ancient Greece
during the 3rd century BC, with later uses in the
Islamic world
and
Medieval Europe
.
Catalog SKU: 0004070
