Omega Centauri (Jochen Maes)

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

Omega Centauri

Link: https://www.jochenmaes.com/astronomy/clusters?itemId=ovz6xghhu2dlsdjf6g24t8cljakja8

Omega Centauri

Link: https://www.jochenmaes.com/astronomy/clusters?itemId=ovz6xghhu2dlsdjf6g24t8cljakja8

Omega Centauri is a globular cluster in the Centaurus constellation, around 17000 light years from earth.

Containing an estimated 10 million individual stars, Omega Centauri is quite sizeable to say the least (and in fact the largest globular cluster in our Milky Way galaxy as far as our observations have been able to show). What's perhaps even more interesting is the properties of some of those individual stars. Generally speaking, globular clusters formed in the early universe out of a single large cloud of gas. As such, you expect the majority of its stars to have certain things in common (age, composition,...). In the case of Omega Centauri, that's not the case.

The most commonly accepted explanation for this is that Omega Centauri is actually not a globular cluster but the remnant of a dwarf galaxy that collided with and got "absorbed" by the Milky Way. As a result, the core of said galaxy was able to gravitationally stick together while the outer layers got flung out and scattered all over the place. That core is what we now see as Omega Centauri.

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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 success
Started	...
Astrometry.net job	6205861
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Omega Centauri

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