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5
Terrestrial Views
Please note the example picture of Mount Rushmore.
Start with the 20mm eyepiece and focus until clear.
After mastering the focus with the 20mm change the
12.5mm eyepiece and practice focusing and scanning
until images become clear in the eyepiece. We have
included some additional examples that are possible
with your telescope such as a bird and a green on a golf
course.
DO NOT POINT YOUR TELESCOPE DIRECTLY AT
THE SUN OR BLINDNESS IS POSSIBLE.
The Moon
The moon is the Earth’s only natural satellite.
Diameter:
3.476 km (2.2 miles)
Distance: 384,401 km (216,486 miles)
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
Right ascension:
05:32.9 (Hours: Minutes)
Declination:
-05º�25´ (Degrees: Minutes)
Distance:
1.500 light years
With a distance of about 1.500 light years, the Orion
Nebula (Messier 42, abbreviation: M 42) is the brightest
diffuse nebula in the sky – visible with the naked eye,
and a rewarding object for telescopes in all sizes, from
the smallest fi eld glass to the largest earthbound
observatories and the Hubble Space Telescope. When
talking about Orion, we‘re actually referring 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
Right ascension: 18:53 (Hours: Minutes)
Declination: +33º 01´ (Degrees: Minutes)
Distance: 2.3 light years
The famous Ring Nebula M 57 in the constellation of
Lyra is often viewed as the prototype of a planetary
nebula; it is one of the magnifi 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 telescopes),
and not of a gas structure in the form of a sphere or
an ellipsis. If you were to look at the Ring Nebula
from the side, it would look like the Dumbbell Nebula
(M27). With this object, we’re looking directly at the
pole of the nebula.
Dumbbell Nebula in the Vulpecula (Fox)
constellation (M 27)
M 27 in the Fox constellation
Right ascension: 19:59.6 (Hours: Minutes)
Declination: +22º�43´(Degrees: Minutes)
Distance: 1.360 light years
The Dumbbell Nebula (M 27) in Fox was the fi rst
planetary nebula ever discovered. On July 12, 1764,
Charles Messier discovered this new and fascinating
class of objects. We see this object almost directly
from its equatorial plane. If you could see the
Dumbbell Nebula from one of the poles, it would
probably reveal the shape of a ring, and we would
see something very similar to what we know from
the Ring Nebula (M 57). In reasonably good weather,
we can see this object well even with small
magnifi cations.
Terrestrial Images
The Moon
Orion Nebula (M 42)
Ring Nebula in Lyra
constellation (M 57)
Dumbbell Nebula in the
Vulpecula (Fox)
constellation (M 27)
f=20 mm
f=20 mm
f=12.5 mm
f=12.5 mm
Содержание T600
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