Manual Bresser 88-45001 (page 25 of 172) (English, German, Dutch, French, Italian, Polish, Portuguese, Spanish)

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1. Technical data:

• Double-lens system (achromatic)

made of glass

• Alt-azimuth mount with equatorial

wedge (Optimised mounting system

with exible shafts)

• Magnication: 45x – 337.5x

• Lens Diameter: 70 mm

• Focal Length: 900 mm

• 3 eyepieces: K-20 / K-12 / K-4 mm

• Diagonal Mirror

• 6x25 Viewnder

• 1,5x Erecting lens

• Adjustable Aluminium Tripod

2. Possible objects for observation:

We have compiled and explained a number of

very interesting celestial bodies and star clus-

ters for you. On the accompanying images

at the end of the instruction manual, you can

see how objects will appear in good viewing

conditions through your telescope using the

eyepieces that came with it.

The Moon

The moon is the Earth’s only natural satellite.

Figure 19)

Diameter: 3.476 km

Distance: approx. 384 401 km

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).

Orion Nebula (M 42)

M 42 in the Orion constellation (Figure 20)

Right ascension: 05:32.9 (Hours: Minutes)

Declination: -05:25 (Degrees: Minutes)

Distance: 1.500 light years

With a distance of about 1500 light years, the

Orion Nebula (Messier 42, abbreviation: M 42)

is the brightest diffuse nebula in the sky – visi-

ble with the naked eye, and a rewarding object

for telescopes in all sizes, from the smallest

eld glass to the largest earthbound observa-

tories and the Hubble Space Telescope.

When talking about Orion, we‘re actually re-

ferring to the main part of a much larger cloud

of hydrogen gas and dust, which spreads out

with over 10 degrees over the half of the Orion

constellation. The expanse of this enormous

cloud stretches several hundred light years.

Ring Nebula in Lyra constellation (M 57)

M 57 in the Lyra constellation (Figure 21)

Right ascension: 18:51.7 (Hours: Minutes)

Declination: -+32:58 (Degrees: Minutes)

Distance: 2.000 light years

The famous Ring Nebula M 57 in the constel-

lation of Lyra is often viewed as the prototype

of a planetary nebula; it is one of the magni-

cent 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 visible with larger telesco-

pes), and not of a gas structure in the form of

a sphere or an ellipsis. If you were to look at

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Bresser 88-45001 Manual

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