Celestron AstroMaster LT 76AZ Telescope AstroMaster LT Series Manual English - Page 15

Celestial Observing

Get Celestron AstroMaster LT 76AZ Telescope PDF manuals and user guides View all Celestron AstroMaster LT 76AZ Telescope manuals
Add to My Manuals
Save this manual to your list of manuals

Page 15 highlights

CELESTIAL OBSERVING 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. Change to optional eyepieces for higher power (magnification) to focus in on a smaller area. Lunar Observing Hints To increase contrast and bring out detail on the lunar surface, use optional 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. For safe solar viewing, use a solar filter that reduces the intensity of the Sun's light, making it safe to view. With a filter you can see sunspots as they move across the solar disk and faculae, which are bright patches seen near the Sun's edge. 15

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
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 ad-
dition, 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. Change to optional eyepieces for
higher power (magnification) to focus in on a smaller area.
Lunar Observing Hints
To increase contrast and bring out detail on the lunar surface, use optional
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 Jupi-
ter 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.
How-
ever, 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.
For safe solar viewing, use a solar filter that reduces the intensity of the Sun’s light, making it safe to view.
With a filter you can see sunspots as they move across the solar disk and faculae, which are bright patches
seen near the Sun’s edge.
15
CELESTIAL OBSERVING