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COMPUTERIZED TELESCOPE
U
Universe
The totality of astronomical things, events, relations and energies capable of being described objec-
tively.
V
Variable Star
A star whose brightness varies over time due to either inherent properties of the star or something
eclipsing or obscuring the brightness of the star.
W
Waning Moon
The period of the Moon's cycle between full and new, when its illuminated portion is decreasing.
Waxing Moon
The period of the Moon's cycle between new and full, when its illuminated portion is increasing.
Z
Zenith
The point on the Celestial Sphere directly above the observer.
Zodiac
The zodiac is the portion of the Celestial Sphere that lies within 8 degrees on either side of the Ecliptic.
The apparent paths of the Sun, the Moon, and the planets, with the exception of some portions of the
path of Pluto, lie within this band. Twelve divisions, or signs, each 30 degrees in width, comprise the
zodiac. These signs coincided with the zodiacal constellations about 2,000 years ago. Because of the
Precession of the Earth's axis, the Vernal Equinox has moved westward by about 30 degrees since that
time; the signs have moved with it and thus no longer coincide with the constellations.
APPENDIX C - RS-232 CONNECTION
For detailed information about controlling NexStar via the RS-232 port, communication protocols and
the RS-232 cable, refer to the NexStar Hand Controls section of the Celestron Knowledge base web
site at: www.celestron.com
APPENDIX D – OTHER RESOURCES
For more information on the use of your new telescope, please be sure to visit the Support pages on
the Celestron website:
www.celestron.com/support
Here you will find set-up videos, the Knowledge base of frequently-asked questions and how to con-
tact Technical Support.
www.celestron.com
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