ASTRONOMY BASICS

28

The Celestial Coordinate System

28

Motion of the Stars

29

Polar Alignment (with optional Wedge)

30

Finding the North Celestial Pole

31

CELESTIAL OBSERVING

32

Observing the Moon

32

Observing the Planets

32

Observing the Sun

32

Observing Deep Sky Objects

33

Seeing Conditions

33

Transparency

33

Sky Illumination

33

Seeing

33

CELESTIAL PHOTOGRAPHY

35

Short Exposure Prime Focus Photography

35

Eyepiece Projection

36

Long Exposure Prime Focus Photography

37

Terrestrial Photography

39

CCD Imaging

39

TELESCOPE MAINTENANCE

40

Care and Cleaning of the Optics

40

Collimation

40

OPTIONAL ACCESSORIES

43

APPENDIX A – TECHNICAL SPECIFICATIONS

46

APPENDIX B – GLOSSARY OF TERMS

48

APPENDIX C –LONGITUDES AND LATITUDES

51

APPENDIX D – RS-232 CONNECTION

56

APPENDIX E – TIME ZONE MAPS

57

SKY MAPS

59

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Celestron 8i manual Care and Cleaning of the Optics Collimation

8i specifications

The Celestron 8i is a highly regarded telescope that has made a significant impact in the world of amateur astronomy, renowned for its performance, advanced features, and user-friendly design. Part of Celestron's Advanced Series, the 8i model boasts an impressive 8-inch Schmidt-Cassegrain optical system, which combines the advantages of a large aperture with a compact design. This allows enthusiasts to explore celestial objects with greater clarity, providing bright, sharp images of planets, star clusters, and nebulae.

One of the standout features of the Celestron 8i is its Fast Star capability, which allows for rapid imaging of celestial objects. Coupled with its advanced StarBright XLT coatings, this system enhances light transmission and increases contrast, resulting in a more vivid and detailed observation experience. This combination makes it an ideal choice for both novice and experienced astronomers who seek high-quality visuals of deep-sky objects.

The telescope's computer-controlled GoTo mount simplifies the process of locating and tracking celestial objects. With the push of a button, users can easily access a database containing over 40,000 astronomical objects, allowing for an effortless stargazing experience. The Celestron 8i also features an intuitive hand controller that enables users to customize their observations and seamlessly navigate the night sky.

The Celestron 8i is designed for portability, despite its robust optical performance. Weighing in at around 45 pounds, it is relatively easy to transport to different observing locations. The telescope's sturdy construction ensures stability while providing ease of setup, facilitating a hassle-free stargazing experience.

In terms of accessories, the 8i comes equipped with a 25mm eyepiece, offering a moderate magnification that is perfect for a variety of targets. Additionally, users can expand their observing capabilities with optional eyepieces, filters, and focal reducers, catering to both visual and astrophotography pursuits.

Overall, the Celestron 8i stands out as a versatile and powerful telescope that meets the needs of amateur astronomers at various skill levels. With its advanced features, superior optics, and impressive usability, the 8i offers a unique and rewarding experience under the night sky. Whether for planetary observation or deep-sky exploration, the Celestron 8i remains a top choice for astronomy enthusiasts.