NGC2359 (Jochen Maes)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: NGC 2359

NGC2359

Link: https://www.jochenmaes.com/astronomy/nebulae?itemId=125pssm22wwkn1c6k1gu4gpt7xt501

NGC2359

Link: https://www.jochenmaes.com/astronomy/nebulae?itemId=125pssm22wwkn1c6k1gu4gpt7xt501

NGC2359 is an emission nebula in the Canis Major constellation, around 12000 light years from earth.

While the overall colours in the area are a fairly common sight for these type of targets (the usual emissions), the thing that stands out is the peculiar shape of the central structure (often referred to as Thor's Helmet, since with a bit of imagination it sort of looks like it). So what's going on there?

The culprit here is a so called "Wolf-Rayet" star in the center of the nebula. This is a massive star that's currently in the last stages of its life (on the edge of going supernova). What happens is that stars at that stage are essentially a delicate balancing act, with gravity pulling inwards and radiation pressure (coming from the nuclear fusion in the star's core) pushing outwards. This causes these stars to pulsate (contracting or expanding as one or the other temporarily gets the upper hand). These pulsations provide a mechanism for stellar material in the outer layers of the star (which is barely being held on to to being with) to get ejected out into space in what we call stellar wind. The effect of this stellar wind is what's shaping the nebula here.

Image acquisition details:

20x1800" HA
20x1800" OII
9x1200" Red
9x1200" Green
9x1200" Blue

Please note: The following tables are updated every 24 hours.

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 success
Started	...
Astrometry.net job	5435227
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC2359

NGC2359

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NGC2359

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