74
CHAPTER 8 - CELESTIAL OBSERVING
With your telescope set up, you are ready to use it for observing. This section covers visual observing for both solar
system and deep sky objects.
Observing the Moon
In the night sky, the Moon is a prime target for your first look because it is extremely bright and easy to find. 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 breathtaking 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. Keep in mind that if you are
not using the clock drive, the rotation of the Earth will cause the Moon to drift out of your field of view. You will have to
manually adjust the telescope to keep the Moon centered. This effect is more noticeable at higher power. If you are using
the clockdrive and have polar aligned, the Moon will remain centered if using the lunar tracking rate. Consult your local
newspaper or a current astronomy magazine to find out when the Moon is visible.
Lunar Observing Hints
•
To ensure accurate tracking, be sure to select the lunar tracking rate.
•
To increase contrast and bring out detail on the lunar surface, use filters. A yellow filter works well at improving
contrast.
Observing the Planets
Other easy 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. All you need to
know is where to look. Most astronomy publications indicate where the planets are in the sky each month.
Planetary Observing Hints
•
King or sidereal rates work best for tracking the planets.
•
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.
Never project an image of the Sun through the telescope. Because of the folded optical design, tremendous heat build-up
will result inside the optical tube. This can damage the telescope and/or any accessories attached to the telescope.
