M45 - The Pleiades Open Cluster (Hap Griffin)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Maia nebula · Merope nebula · NGC 1432 · NGC 1435 · The star Atlas (27Tau) · The star Celaeno (16Tau) · The star Electra (17Tau) · The star Merope (23Tau) · The star Pleione (28Tau) · The star Sterope I (21Tau) · The star Taygeta (19Tau) · The star ηTau

M45 - The Pleiades Open Cluster, Hap Griffin

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M45 - The Pleiades Open Cluster

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M45 - The Pleiades Open Cluster

Here is M45, otherwise known as the Pleiades star cluster, high in the eastern sky now after sunset This open cluster of hot, young stars (approximately 100 million years old) is easily visible with the naked eye and has been known since ancient times. The Pleiades are sometimes called the "Seven Sisters" from Greek mythology, or "Subaru" by the Japanese (this is where the car name and symbol came from). Often, this cluster is mistaken by laymen for the Little Dipper due to its shape (the real Little Dipper is much larger and in another part of the sky).

The beautiful blue reflection nebula surrounding the stars of the cluster was once thought to be the remains of the cluster's birth cloud. However, recent measurements of the relative velocities and directions of travel of the cloud and stars reveal that they are unrelated...we are fortunate to be living in a time when their chance collision creates one of the most beautiful sites in the winter sky. The distance to M45 is 380 light-years.

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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	1509658
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M45 - The Pleiades Open Cluster

M45 - The Pleiades Open Cluster

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M45 - The Pleiades Open Cluster

M45 - The Pleiades Open Cluster

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