Summer Triangle
labels on/off
| Date: | 18.5.99 |
Time: | 0:43 UT |
Exposure: | 16 min |
| Field of View: | 51o x 58o |
Emulsion: | Kodak Royal 400 Select |
Filter: | none |
| Instrument: | f=24mm 1/4.0 |
Place: | Gillersheim, Lower Saxonia |
Observer: | T. Credner |
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Notes to the data
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The northern summer night sky is dominated by the "Summer Triangle"
consisting of the three brightest stars Deneb, Vega, and Altair in the
corresponding constellations of
Cygnus (the Swan),
Lyra (the Lyre), and
Aquila (the Eagle)
(see labels).
The Milky Way has its brightest parts of the northern hemisphere in this
field of the sky. A number of uncountable stars of our own galaxy
builds up this fuzzy appearance to the naked eye. If you watch carefully
you will recognize structures and dark bands in the Milky Way. From Cygnus
southwards lies the so called "Great Rift", a dark band of interstellar dust
that is absorbing light of the stars behind. And on a long exposed
photography, like the above wide angle image, you can see much fainter objects.
For example red emission nebulae of ionized hydrogen like the so called
North America Nebula (upper left)
or a couple of small star clusters (see also the
Cygnus and Lyra page).
© Copyright by the observers
