Edu Science WIFI 70-900 User Manual page 5

Possible objects for observation:
We have compiled and explained a number of very interesting celestial
bodies and star clusters for you but we suggest that you start practicing
during the day focusing on terrestrial objects such as birds and or
trees at varying distances from 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 at varying powers
(see pictoral examples below).
Terrestrial Views
Please note the example picture of Mount Rushmore. Start with the
26mm Plössl eyepiece and focus until clear. After mastering the focus
with the 26mm change the 9.7mm 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
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
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 – 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.
Terrestrial Images
f=26mmf
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: 18:51.7 (Hours: Minutes)
Declination: -+32:58 (Degrees: Minutes)
Distance: 2.000 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: -+22:43 (Angle: Minutes)
Distance: 1.250 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.
The Moon
=9.7mm
Orion Nebula (M 42)
Ring Nebula in Lyra
constellation (M 57)
Dumbbell Nebula in the
Vulpecula (Fox)
constellation (M 27)
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f=26mmf =9.7mm