Bedienungsanleitung Bresser 90-70000 National Geographic (Seite 16 von 48) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Spanisch, Polnisch)

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Protect the device from dust and moisture. After use, particularly in

high humidity, let the device acclimatize for a short period of time, so

that the residual moisture can dissipate before storing. Remove the

dust cover and store it in the included bag during use.

Part III—Appendix

1. Possible Observation Targets

The following section details several interesting and easy-to-find

celestial objects you may want to observe through your telescope.

The pictures at the end of the manual show what the objects will

look like through your telescope's eyepiece.

The Moon (No. 32)

The moon is Earth's only natural satellite.

Diameter: 3,476 km

Distance: 384,400 km from Earth (average)

The moon has been known to humans since prehistoric times. It is

the second brightest object in the sky, after the sun. Because the

moon circles the Earth once per month, the angle between the Earth,

the moon and the sun is constantly changing; one sees this change

in the phases of the moon. The time between two consecutive new

moon phases is about 29.5 days (709 hours).

Constellation Orion: The Orion Nebula (M42) (No. 33)

Right Ascension: 05

(hours : minutes)

Declination: -05° 22' (degrees : minutes)

Distance: 1,344 light years from Earth

Though it is more than 1,344 light years from Earth, the Orion Nebula

(M42) is the brightest diffuse nebula in the sky. It is visible even with

the naked eye and is a worthwhile object for telescopes of all types

and sizes. The nebula consists of a gigantic cloud of hydrogen gas

with a diameter of hundreds of light years.

Constellation Lyra: The Ring Nebula (M57) (No. 34)

Right Ascension: 18

(hours : minutes)

Declination: +33° 02'

(degrees : minutes)

Distance: 2,412 light years from Earth

The famous Ring Nebula (M57) in the Lyra constellation is often

viewed as the prototype of a planetary nebula. It is one of the mag-

nificent features of the Northern Hemisphere's summer sky. Recent

studies have shown that it is probably comprised of a ring (torus)

of brightly shining material that surrounds the central star (only vis-

ible with larger telescopes), and not a gas structure in the form of a

sphere or an ellipse. If you were to look at the Ring Nebula from the

side, it would look like the Dumbbell Nebula (M27). When viewed

from Earth, we are looking directly at the pole of the nebula.

Constellation Vulpecula (Little Fox):

The Dumbbell Nebula (M27) (No. 35)

Right Ascension: 19

(hours : minutes)

Declination: +22° 43' (degrees : minutes)

Distance: 1,360 light years from Earth

The Dumbbell Nebula (M27) was the first planetary nebula ever dis-

covered. On 12 July 1764, Charles Messier discovered this new and

fascinating class of objects. We see this object almost directly from

its equatorial plane. If we could see the Dumbbell Nebula from one

of its poles, we would probably see the shape of a ring, something

very similar to what we know as the Ring Nebula (M57). In reason-

ably good weather, we can see this object well, even with low mag-

nification.

2. Troubleshooting:

Problem: Solution:

No picture Remove dust protection cap

from the objective opening.

Blurred picture Adjust focus using the focus wheel.

No focus possible Wait for temperature to balance out.

Bad picture quality Never observe through a glass surface.

Object is visible Adjust viewfinder scope

in the viewfinder scope, (See Part I, Section 8).

but not through the telescope.

Despite using The diagonal mirror

diagonal mirror, should be vertical in

the picture is the eyepiece connection.

crooked.

DISPOSAL

Dispose of the packaging materials properly,

according to their type, such as paper or card-

board. 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.

Warranty and Warranty Term Extension

The warranty term is two years from the date of purchase. Please keep

your proof of purchase. Register at www.bresser.de/warranty and ﬁ ll

out a brief questionnaire to get your warranty term extended to ﬁ ve

years. Registration must be completed within three months of pur-

chase (date of receipt) to validate the warranty. If you register thereaf-

ter, the warranty term will not be extended. If you have problems with

your device, please contact our customer service ﬁ rst. Do not send

any products without consulting us ﬁ rst by telephone. Many problems

with your device can be solved over the phone. If the problem oc-

curred after the warranty ended or it is not covered by our warranty

terms, you will receive a free estimate of repair costs.

Service Hotline: +49 (0) 2872 - 80 74-210

Important for any returns:

Please make sure to return the device carefully packed in the original

packaging in order to prevent damage during transport. Also, please

enclose your receipt for the device (or a copy) and a description of the

defect. This warranty does not imply any restriction of your statutory

rights.

Your dealer: ...........................................................................................

Art. No.: .................................................................................................

Description of problem: .........................................................................

...............................................................................................................

Name: ....................................................................................................

Street: ....................................................................................................

City/Postcode: .......................................................................................

Telephone: .............................................................................................

Date of purchase: ..................................................................................

Signature: ..............................................................................................

Bresser 90-70000 National Geographic Seite 16

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