Bresser 76/700 Mode D'emploi page 13

Part III – Appendix
1. Possible observation targets
In the following, we like to present to you a choice of very
interesting and easy-to-find celestial objects. On the depending pic-
tures at the end of the manual you will see how they will appear in the
eyepiece of your telescope:
The moon (Fig. 23)
The moon is the only natural satellite of the earth.
Diameter: 3,476 km
Distance: 384,000 km (average)
The moon is well-known since thousands of years. He is the second-
brightest celestial object after the sun. Because the moon circles
around the earth, he changes periodically its inclination to the sun;
therefore we see changing phases. The time for one complete lunation
is 29.5 days (709 hours).
Constellation Orion: The great Orion nebula / M 42 (Fig. 24)
Right Ascension: 05h 33' (hours : minutes)
Declination: -05° 25' (Degrees : minutes)
Though it is 1,600 light years away, the Orion nebula (M 42) is the
brightest nebula object at the sky – visible even with naked eyes and
a worthwhile object for telescopes of all kinds and sizes. It consists of
a gigantic cloud of hydrogen gas with a diameter of hundreds of light
years, taking a field on the sky of 10°.
Constellation Lyra: The Ring Nebula / M 57 (Fig. 25)
Right Ascension: 18h 52'
Declination: +32° 58'
Distance: 4,100 light years
The famous Ring Nebula is often called the prototype of planetary
nebulae; he belongs to the northern hemisphere summer sky's pieces
of splendour. Recent investigations have shown that he is a ring of
light-emitting matter that surrounds its central star (only visible in bigger
telescopes). If one could look onto its top, he would see a structure like
the Dumbbell Nebular / M 27
Constellation Vulpecula (little fox):
The Dumbbell Nebula / M 27 (Fig. 26)
Right Ascension: 19h 59'
Declination: +22° 43'
Distance: 1,250 light years
The Dumbbell Nebula / M 27 was the first planetary nebula ever
found. On July 12th, 1764, Charles Messier discovered this new and
fascinating class of objects. We can see it directly from its equatorial
pane. If it could be viewed from top, we would appear like the Ring
Nebula / M 57. This Object can even be viewed at average weather
conditions at low magnifications.
2. Troubleshooting
Mistakes: Help:
No picture Remove dust protection cap and
sunbathe-shield from the objective
opening.
Blurred picture Adjust focus using focus ring
No focus possible Wait for temperature to balance out
Bad picture Never observe through a glass surface
Viewing object visible Adjust finder (See Part II-4)
in the finder, but not
through the telescope
Despite using star The star diagonal prism
diagonal prism should be vertical in
the picture is the eyepiece connection
"crooked"
DISPOSAL
Dispose of the packaging materials properly,
according to their type (paper, cardboard, etc).
Contact your local waste disposal service or
environmental authority for information on the
proper disposal.
Please take the current legal regulations into
account when disposing of your device. You
can get more information on the proper disposal
from your local waste disposal service or envi-
ronmental authority.
3. Warranty
The period of warranty is 2 years, beginning on the day of purchase.
Please keep the cash receipt as evidence of purchase. Devices which
become defective during the warranty period can be returned to the
dealer where the device was bought. The repaired device or a new one
will then be returned to you. In the case of defects which occur after the
end of the warranty period, the devices can also be returned. However,
repairs which become necessary after the end of the warranty period will
be subject to a service fee.
Important:
Make sure to return the microscopes carefully packed in the
original packaging in order to prevent transport damage.
Please also enclose the cash receipt (or a copy).
This guarantee does not imply any restriction of your
statutory rights.
Your dealer:
Name: .......................................................................................
Postcode / City:..........................................................................
Street: .......................................................................................
Telephone: .................................................................................
Date of purchase: ........................................................................
Signature: ..................................................................................
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