Celestron Ultima 80 - Manual (Page 13)

CELESTIAL OBSERVING
Now that your telescope is set up, you’re 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. Although the
beauty of the full moon may make it seem a perfect viewing object, in fact, the
light reflected from its fully illuminated face 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, such as a
crescent or quarter moon. At these times, long shadows reveal a great amount of
detail on the lunar surface. At low power, with the standard eyepiece, you’ll be
able to see the whole lunar disk at one time. Change to higher power
(magnification) with an optional eyepiece to focus in on a smaller area. Keep in
mind that the rotation of the earth will cause the moon to drift out of your field of
view. You’ll have to manually adjust the telescope to keep the moon centered.
This effect is more noticeable at higher power. Consult a current astronomy magazine or your local newspaper to find out
the current phase of the moon.
Lunar Observing Hint
To increase contrast and bring out visible detail on the lunar surface, try using different filters (available through your local
Celestron dealer). A yellow filter works well for improving contrast.
Observing the Planets
Other easy targets include the five “naked eye” planets of our solar system, so
called because they can be spotted in the night sky by the unaided eye. 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’ll be able to see the cloud belts
of Jupiter, perhaps even the great Red Spot. In addition, you’ll 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, as is Mercury. All you need to know
is where to look. Most astronomy publications indicate where the planets are in
the sky each month.
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