M1 - The Crab Nebula (Hap Griffin)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Crab nebula · M 1 · NGC 1952

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M1 - The Crab Nebula

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M1 - The Crab Nebula

The mysterious "Crab Nebula", otherwise known as M1 in the constellation of Taurus...shown here in natural color. The Crab Nebula is a supernova remnant...the expanding guts of a star that blew off its outer layers in the year 1054 (our time) with only the collapsed core of the progenitor star left at its center. The explosion was so bright that it could be seen from Earth in the daytime and was documented by the Chinese and the American Indians. What remains at the center of this maelstrom is a "neutron star"...a relatively small body consisting of only neutrons caused by the crushing collapse of the atomic structure of the atoms making it up...pressured so strongly in the explosion that the electrons of the atoms in its core have been crushed into the proton atomic nuclei so that only neutrons remain. The collapse of the star also increased its speed of rotation greatly so that we now see it rotating at 30 revolutions per second...sending a beam of radio noise our way pulsating at 30 times per second...a "pulsar". When initially discovered in 1968, this regularly pulsing signal was thought to be of alien origin before the physics of the situation was understood and other pulsars found. The neutron star is also emitting strong X-rays, which are often used as a source to calibrate x-ray astronomy equipment.

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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	1508871
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M1 - The Crab Nebula

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