Omega Centauri - NGC 5139 (Caldwell 80) (Bruce Rohrlach)

Celestial hemisphere: Southern · Constellation: Centaurus (Cen) · Contains: NGC 5139 · Omega Centauri

Omega Centauri - NGC 5139 (Caldwell 80), Bruce Rohrlach

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Omega Centauri - NGC 5139 (Caldwell 80)

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Omega Centauri - NGC 5139 (Caldwell 80)

Omega Centauri - the disrupted core segment of a dwarf galaxy. With an estimated 10 million stars (suns) crowded into a volume 230 light years across, the night sky from any one of the 100 million or so planets within the cluster would be intensely bright. Being so tightly bound by gravity, globular clusters are very old features, with Omega Centauri being around 11.5 billion years old. In contrast open clusters whose stars are more weakly bound by gravity tend to disperse within just a few billion years.

With a suspected black hole at its centre (typical of most galaxies in general), this supports its origin as an imposter to the Milky Way, a captured satellite galaxy that was dismembered by an encounter with the gravitational forces of the Milky Way, leaving its remnant core now forever captured in the region of Centaurus.

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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.

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Astrometry.net job	4491656
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Omega Centauri - NGC 5139 (Caldwell 80)

Omega Centauri - NGC 5139 (Caldwell 80)

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Omega Centauri - NGC 5139 (Caldwell 80)

Omega Centauri - NGC 5139 (Caldwell 80)

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