Manual Bresser 90-65000 National Geographic (page 10 of 32) (English, German, Dutch, French, Italian, Spanish)

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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 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

Distance: 2,412 light years from Earth

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 ellipse.

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

Distance: 1,360 light years from Earth

The Dumbbell Nebula (M 27) in the Fox constellation was the ﬁ rst planetary nebula ever discovered. 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 you could see the Dumbbell Nebula from one of its poles, it would probably reveal that

it’s in 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 at small magniﬁ cations.

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Bresser 90-65000 National Geographic Manual

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