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Sidereal time ("
sidereal"
pronounced /saɪˈdɪəriəl, sə-/ sy-DEER-ee-əl, sə-) is a
system of
timekeeping used
especially by astronomers.
Using sidereal...
- In astrology,
sidereal and
tropical are
terms that
refer to two
different systems of
ecliptic coordinates used to
divide the
ecliptic into
twelve "signs"...
- the
current cultural cycles. The
center of the
clock will show a star field,
indicating both the
sidereal day and the
precession of the zodiac.
Around this...
-
calendar of this type is
called a
sidereal solar calendar. The mean
calendar year of such a
calendar approximates the
sidereal year.
Leaping from one lunation...
-
between 1896 and 1912. A
domestic clock housed in a
wooden case, it
gives indications including the solar, mean and
sidereal time
around the world, the positions...
-
commonly seen in
astronomical clocks of the period. The
small golden star
shows the
position of the
vernal equinox, and
sidereal time can be read on the scale...
-
display at the
National Museum of
Scotland in Edinburgh. He made a
sidereal clock for the City Observatory,
formerly the
Calton Hill Observatory, where...
- In astronomy, a
clock drive (also
known as a
sidereal drive or
field rotator) is a motor-controlled
mechanism used to move an
equatorial mounted telescope...
-
resulted in
adoption of an
ephemeris time
scale expressed in
units of the
sidereal year at that
epoch by the IAU in 1952. This
extrapolated timescale brings...
- for example, a star, the
observer needs a
sidereal clock in
addition to the
mural instrument. With the
clock measuring time, a star of
interest is observed...
