Manual Bresser 88-43202 National Geographic (page 13 of 62) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Spanish, Norwegian, Finnish)

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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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Bresser 88-43202 National Geographic Manual

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