Bresser Junior 60/700 Instrucciones De Uso página 19

Orion Nebula (M 42)
M 42 in the Orion constellation (Figure 14)
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 field
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 (Figure 15)
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 magnificent 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 (Figure 16)
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
first 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 magnifications.
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