IC 1795 The Fishhead Nebula Ha (Frank Iwaszkiewicz)

IC 1795 The Fishhead Nebula Ha

Beschreibung:

Dieses kosmische Porträt zeigt leuchtendes Gas und undurchsichtige Staubwolken in IC 1795, einer Sternbildungsregion im nördlichen Sternbild Kassiopeia. Die bemerkenswerten Details des auch als NGC 896 katalogisierten Nebels sind in Schwarz/ Weiß abgebildet und wurden mit einer empfindlichen Kamera bei langen Belichtungszeiten aufgenommen, mit einem Schmalbandfilter. Der Schmalbandfilter ist nur für H-Alpha-Licht durchlässig - das rote Licht von Wasserstoffatomen. Ein Wasserstoffatom strahlt, wenn es vom Ultraviolettlicht energiereicher junger Sterne angeregt wird, das charakteristische H-Alpha-Licht ab, wenn ein einzelnes Elektron wieder eingefangen wird und ein niedrigeres Energieniveau einnimmt. IC 1795, am Himmel nicht weit vom berühmten Doppelsternhaufen im Perseus entfernt, steht als Teil eines Sternbildungskomplexes am Rand einer großen Molekülwolke auch nahe bei IC 1805, dem Herznebel. Der größere Sternbildungskomplex, der weiter als 6000 Lichtjahre von uns entfernt ist, breitet sich entlang des Perseus-Spiralarms unserer Galaxis, der Milchstraße, aus. In der entsprechenden Entfernung würde dieses Bild eine Länge von etwa 70 Lichtjahren in IC 1795 einnehmen.

(Quelle: APOD)

Original
Final
B

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic failed
Started	...
Astrometry.net job	553012
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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