A Galactic Bubble (Callum Hayton)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble nebula · M 52 · NGC 7635 · NGC 7654

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A Galactic Bubble

Link: https://www.flickr.com/photos/80205804@N05/

Powered byPixInsight

A Galactic Bubble

Link: https://www.flickr.com/photos/80205804@N05/

This small area of sky lies in the constellation Cassiopeia, easily spotted if you look for 5 stars making up a W-shape. Cassiopeia is a constellation rich in nebula but especially star clusters. In the top left of the image is the open cluster know as Messier 52. The 35 million year old cluster contains around 200 stars and is estimated to be anywhere from 3000 to 7000 light years away. The uncertainty in its distance is due to it lying on the galactic plane and the light leaving the cluster being absorbed and scattered by cosmic dust on its long journey to Earth. This is called interstellar absorption.

To the right of the image sitting 11,000 light years away among a molecular cloud is the aptly named Bubble nebula. The shell like nebula was formed by stellar wind blown from the massive hot star at its centre. The star, cataloged as BD+602522 is several hundred thousand times more luminous than our Sun and around 45 times the size. Its not only the cause of the bubble but also the glowing gas that surrounds it. To get an idea of the scale here, the bubble nebula is 10 light years in diameter. To travel in the (now retired) space shuttle at 18,000 miles an hour would take roughly 370,000 years to travel from one side to the other. And thats just a tiny little bubble.

This is my second image processed with Pixinsight. Not too happy with the processing which was a bit rushed as my trial will be ending any day now and i have some other images to get through. But i will have another bash when i can afford to pay out for the full version.

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	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
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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
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Amateur hosting facility
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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	408509
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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