NGC 7635: The Pearl of Cassiopeia (AaronW)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · HD220057 · HD240233 · LBN 542 · LBN 543 · LBN 548 · LBN 549 · LDN 1225 · LDN 1231 · NGC 7538 · NGC 7635 · PK112-00.1 · Sh2-158 · Sh2-159 · Sh2-162

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NGC 7635: The Pearl of Cassiopeia

Link: https://www.instagram.com/siderevs_nuncivs/

Powered byPixInsight

NGC 7635: The Pearl of Cassiopeia

Link: https://www.instagram.com/siderevs_nuncivs/

In 1787, while Mozart was composing Eine kleine Nachtmusik and America was finalizing its Constitution, William Herschel discovered NGC 7635, commonly known today as the Bubble nebula. Although it looks delicate, the 7-light-year diameter bubble offers evidence of violent processes at work. The seething star forming this bubble lies inside it and is 45 times more massive than the Sun.

A fierce stellar wind from this star has blasted out the structure of glowing gas against a surrounding molecular cloud made of dense pillars of cool hydrogen gas laced with dust. With 145 hours of hydrogen, sulfur, and oxygen data captured from my backyard, I marvel at the fact that we can give ourselves a front-row seat to the awe-inspiring universe we live in. And this show isn’t yet over…in roughly 10 million years, this star is expected to detonate as a supernova. This bubble will soon pop!

Processed in PixInsight in the Hubble palette.

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	Advanced success
Started	...
Astrometry.net job	9526900
PixInsight job	ZU4TASUGQ77S9F4MN6F5ASGA1AA6M3F3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h17m49s.11
RA (top/left)	23h24m24s.85
RA (top/right)	23h23m52s.60
RA (bottom/right)	23h11m02s.83
RA (bottom/left)	23h11m54s.50

Dec (center)	+61°15′13″.3
Dec (top/left)	+60°49′26″.8
Dec (top/right)	+61°47′15″.5
Dec (bottom/right)	+61°39′29″.6
Dec (bottom/left)	+60°41′43″.8

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NGC 7635: The Pearl of Cassiopeia

NGC 7635: The Pearl of Cassiopeia

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Image Index:

Contribution Index (beta):

NGC 7635: The Pearl of Cassiopeia

NGC 7635: The Pearl of Cassiopeia

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