The Hercules Globular Cluster (M13) (JohnEEvans)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Hercules Globular Cluster · M 13 · NGC 6205 · NGC 6207

The Hercules Globular Cluster (M13), JohnEEvans

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The Hercules Globular Cluster (M13)

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The Hercules Globular Cluster (M13)

The Hercules Globular Cluster is a cluster of several hundred thousand stars in the constellation Hercules about 25,000 light-years away.

M13 is one of about 100 globular clusters in our galaxy. The concentration of stars in the centre of M13 is about 100x the concentration of stars in the neighbourhood of our Sun. Globular clusters have some of the oldest stars in the universe. They are likely to have formed at the start of the formation of the Milky Way, so they are amongst the oldest stars. The brightest reddish stars in the cluster are ancient red giants. These aging stars have expanded to many times their original diameters and then cooled. The blue-white stars are the hottest in the cluster.

Age of Universe -> 13.8 billion years
Age of Milky Way -> 13.2 billion years.
Age of stars in M13 -> 12-13 billion years.
Age of M13 cluster -> 11.7 billion years.
Age of Solar System (incl. Earth) -> 4.5 billion years.

There are some dust lanes in the shape of a 3-bladed propeller to be found in M13. In this image the propeller is bottom right of the core.

In 1974 the Arecibo Observatory's Radio Telescope beamed a 3 minute long message towards M13, containing information about the human race, DNA, atomic numbers, Earth's position and other information.

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	5615545
PixInsight job	n/a
PixInsight queue size	n/a
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The Hercules Globular Cluster (M13)

The Hercules Globular Cluster (M13)

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The Hercules Globular Cluster (M13)

The Hercules Globular Cluster (M13)

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