NGC7000
The gas nebula is between 2,000 and 3,000 light-years away (its exact distance is difficult to determine) and consists mainly of hydrogen, some of which is ionized (HII) and emits visible light in the form of deep red radiation. On long-exposure photographs, the nebula therefore appears intensely reddish.' role="button">
Michael Geissel
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NGC7000
NGC7000 update with 10 hours of exposure time.The North America Nebula (also called NGC 7000) is a diffuse gas nebula in the constellation Cygnus in the northern sky.
The nebula got its name because its shape resembles a map of the North American continent. In the sky, the nebula is very large, measuring 120 by 100 arcminutes (the full moon has a diameter of about 30'). It is relatively easy to find as it lies slightly east of the bright star Deneb (α Cygni) in Cygnus.
The gas nebula is between 2,000 and 3,000 light-years away (its exact distance is difficult to determine) and consists mainly of hydrogen, some of which is ionized (HII) and emits visible light in the form of deep red radiation. On long-exposure photographs, the nebula therefore appears intensely reddish.NGC7000 update with 10 hours of exposure time.
The North America Nebula (also called NGC 7000) is a diffuse gas nebula in the constellation Cygnus in the northern sky.
The nebula got its name because its shape resembles a map of the North American continent. In the sky, the nebula is very large, measuring 120 by 100 arcminutes (the full moon has a diameter of about 30'). It is relatively easy to find as it lies slightly east of the bright star Deneb (α Cygni) in Cygnus.
The gas nebula is between 2,000 and 3,000 light-years away (its exact distance is difficult to determine) and consists mainly of hydrogen, some of which is ionized (HII) and emits visible light in the form of deep red radiation. On long-exposure photographs, the nebula therefore appears intensely reddish.NGC7000 update auf 10 Stunden Belichtungszeit.
Nordamerikanebel (auch NGC 7000 genannt) ist die Bezeichnung eines diffusen Gasnebels im Sternbild Schwan am Nordsternhimmel.
Seinen Namen erhielt der Nebel aufgrund seiner Form, die an eine Landkarte des nordamerikanischen Kontinents erinnert. Am Himmel ist der Nebel mit 120 mal 100 Bogenminuten sehr ausgedehnt (der Vollmond hat einen Durchmesser von ca. 30&039;). Er ist relativ einfach zu finden, da er sich etwas östlich des hellen Sterns Deneb (α Cygni) im Schwan befindet.
Der Gasnebel ist zwischen 2.000 und 3.000 Lichtjahre entfernt (seine genaue Entfernung ist nur schwer zu bestimmen) und besteht überwiegend aus Wasserstoff, der teilweise in ionisierter Form (HII) auftritt und sichtbares Licht in Form von tiefroter Strahlung emittiert. Auf lang belichteten Fotografien erscheint der Nebel daher intensiv rötlich.