Henize 70 / N70 (John Dziuba)

Celestial hemisphere: Southern · Constellation: Dorado (Dor) · Contains: HD269989 · HD270016 · HD270032 · HD270055 · HD270076 · HD270119 · HD38941 · HD38942 · HD39282

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Henize 70 / N70

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Henize 70 / N70

Henize 70 is an emission nebula and superbubble located in the Large Magellanic cloud, a satellite galaxy to our Milky Way. It is located roughly 160,000 light years away and has a diameter of roughly 300 light years.

Superbubbles are large expanding areas of interstellar gas, being blown outwards by winds from hot, massive stars and supernova explosions. Their interiors are less dense than the surrounding medium with the intense winds, passage and gravity of newly born stars stripping the superbubbles of most internal dust and gas.

At the center of Henize 70 is a small group of extremely hot and massive stars. Some of these stars are rapidly losing mass and have stellar winds blowing from their surfaces with velocities that approach 4000 kilometers per second.

Because the lifetimes of massive stars are measured in only tens of millions of years, after one supernova has swept clear a bubble around itself, there isn’t enough time for the interstellar medium to back-fill the cavity before other stars explode in the same region. Each subsequent supernova will rejuvenate the cavity left by the previous ones.

Our own Solar System lies near the center of an old superbubble, known as the Local Bubble, whose boundaries can be traced by a sudden rise in dust extinction of exterior stars at distances greater than a few hundred light years.

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Southern Hemisphere Astro
Fine Art Astrophotography

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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	Advanced success
Started	...
Astrometry.net job	8746376
PixInsight job	W0K3MXZ1XBIP5IVFS507V4J0ZBC4UI5Q
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h43m21s.908
RA (top/left)	05h42m51s.588
RA (top/right)	05h39m49s.585
RA (bottom/right)	05h43m53s.226
RA (bottom/left)	05h46m50s.892

Dec (center)	-67°51′15″.72
Dec (top/left)	-67°28′44″.10
Dec (top/right)	-68°02′09″.38
Dec (bottom/right)	-68°13′47″.29
Dec (bottom/left)	-67°40′05″.48

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Henize 70 / N70

Henize 70 / N70

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Henize 70 / N70

Henize 70 / N70

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