| Zenith | When observing the sky, the zenith is the point directly overhead of the observer. | |
| Zero Image Shift Focuser | A secondary focusing system for a catadioptric system to aid in astro-imaging. Usually this is done by locking the focusing mirror and achieving focus by moving the opticalline behind the rear cell forwad or back. | |
| Zodiacal Constellation | Any constellation which lays along the path of the Sun (The Ecliptic). In the 3000-year old religion of astrology, there are 12 zodiacal constellations, but do to the 10,000 year wobble of the Earth known as "precession," there are actually 13 zodiacal constellations. | |
| The "Stars and Scopes" Glossary was compiled by Peter Ue from various sources on the internet. I tried to correct and edit as much as possible, but I can make no claim or warrenty to the information here. If you find any errors just contact me and I'll try to fix it - Thanks , Peter. |
