Globulo cometario CG4 e Galassia: PGC 21338 (Alberto Tomatis)

Celestial hemisphere: Southern · Constellation: Puppis (Pup)

Globulo cometario CG4 e Galassia: PGC 21338

Globulo cometario CG4 e Galassia: PGC 21338

Un anguilla spettrale gigante sembra essere a caccia della galassia a spirale in questa immagine

presa dal telescopio Planewave 20" (0.51m) CDK situati in Australia. L'anguilla è in realtà una piccola,

isolata nube di gas e polvere chiamata globulo cometario a causa della sua somiglianza con un cometa.

Questo globulo cometario denominato "CG4" , si trova a circa 1.300 anni luce dalla Terra nella costellazione

della poppa nell'emisfero australe. L'anguilla sembra divorare la galassia a spirale denominata ESO 257-19 .

Fortunatamente, questa è un'illusione. Dato che la galassia è al sicuro e fuori dalla portata della

nube a 100 milioni di anni luce da CG4.

CG4 è una spettacolare nube di gas molecolare e polvere, illuminata dalla luce

delle stelle vicine, distante da noi circa 1300 anni luce. La forma allungata e filamentosa conferisce a questi

oggetti il loro tipico aspetto cometario. I globuli cometari, brandelli di nubi originariamente molto più grandi,

sono vere e proprie "nursery" stellari. Al loro interno, freddo e oscuro, vi è abbastanza gas e polvere da formare

numerose stelle con masse paragonabili a quella del Sole.

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Distribution of astrophotographers

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	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
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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 success
Started	...
Astrometry.net job	6583484
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Globulo cometario CG4 e Galassia: PGC 21338

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Globulo cometario CG4 e Galassia: PGC 21338

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