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With your telescope set up, you are ready to use it for observing. This section covers visual observing hints for both
solar system and deep sky objects as well as general observing conditions which will affect your ability to observe.
Observing the Moon
Often, it is tempting to look at the Moon when it is full. At this time,
the face we see is fully illuminated and its light can be overpowering.
In addition, little or no contrast can be seen during this phase.
One of the best times to observe the Moon is during its partial phases
(around the time of first or third quarter). Long shadows reveal a great
amount of detail on the lunar surface. At low power you will be able to
see most of the lunar disk at one time. The optional Reducer/Corrector
lens allows for breath-taking views of the entire lunar disk when used
with a low power eyepiece. Change to higher power (magnification) to
focus in on a smaller area. Choose the lunar tracking rate from the
hand control's MENU tracking rate options to keep the moon centered
in the eyepiece even at high magnifications.
Lunar Observing Hints
To increase contrast and bring out detail on the lunar surface, use filters. A yellow filter works well at improving
contrast while a neutral density or polarizing filter will reduce overall surface brightness and glare.
Observing the Planets
Other fascinating targets include the five naked eye planets. You can
see Venus go through its lunar-like phases. Mars can reveal a host of
surface detail and one, if not both, of its polar caps. You will be able to
see the cloud belts of Jupiter and the great Red Spot (if it is visible at
the time you are observing). In addition, you will also be able to see the
moons of Jupiter as they orbit the giant planet. Saturn, with its beautiful
rings, is easily visible at moderate power.
Planetary Observing Hints
• Remember that atmospheric conditions are usually the
limiting factor on how much planetary detail will be visible.
So, avoid observing the planets when they are low on the
horizon or when they are directly over a source of radiating
heat, such as a rooftop or chimney. See the "Seeing Conditions" section later in this section.
• To increase contrast and bring out detail on the planetary surface, try using Celestron eyepiece filters.
Observing the Sun
Although overlooked by many amateur astronomers, solar observation is both rewarding and fun. However, because
the Sun is so bright, special precautions must be taken when observing our star so as not to damage your eyes or your
telescope.
- Warning 4
- Figure 2.1 – Advanced Series 5
- (Advanced C8-SGT Shown) 6
- C5-S C8-S 7
- C9.25-S 7
- Figure 2-6 9
- Figure 2-7 9
- Figure 2-5 9
- Figure 2-8 10
- Figure 2-9 10
- Figure 2-13 13
- Figure 2-12 13
- Figure 2-14 14
- Figure 2-15 15
- R.A. Lockin 15
- Figure 3-1 16
- The Advanced GT Hand Control 16
- Hand Control Operation 17
- Selecting an Object 21
- Slewing to an Object 21
- Finding Planets 21
- Tour Mode 22
- Constellation Tour 22
- Direction Buttons 22
- Rate Button 22
- Identify 24
- Precise GoTo 25
- Scope Setup Features 25
- Observing 26
- Helpful 26
- Utility Features 27
- ADVANCED GT 29
- Image Orientation 30
- Focusing 31
- Aligning the Finderscope 31
- Calculating Magnification 31
- Determining Field of View 32
- General Observing Hints 32
- Motion of the Stars 34
- Figure 5-3 35
- Observing the Moon 38
- Lunar Observing Hints 38
- Observing the Planets 38
- Observing the Sun 38
- Eyepiece Projection 42
- Terrestrial Photography 45
- Metering 45
- Reducing Vibration 45
- CCD Imaging 45
- Auto Guiding 46
- Collimation 47
- CONNECTICUT 56
- 58
- Additional RS232 Commands 62
- CELESTRON TWO YEAR WARRANTY 71
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