APOD: NGC 6164: Dragon's Egg Nebula and Halo (2022 Dec 26)

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APOD Robot
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APOD: NGC 6164: Dragon's Egg Nebula and Halo (2022 Dec 26)

Post by APOD Robot » Mon Dec 26, 2022 5:09 am

Image NGC 6164: Dragon's Egg Nebula and Halo

Explanation: The star at the center created everything. Known as the Dragon's Egg, this star -- a rare, hot, luminous O-type star some 40 times as massive as the Sun -- created not only the complex nebula (NGC 6164) that immediately surrounds it, but also the encompassing blue halo. Its name is derived, in part, from the region's proximity to the picturesque NGC 6188, known as the fighting Dragons of Ara. In another three to four million years the massive star will likely end its life in a supernova explosion. Spanning around 4 light-years, the nebula itself has a bipolar symmetry making it similar in appearance to more common planetary nebulae - the gaseous shrouds surrounding dying sun-like stars. Also like many planetary nebulae, NGC 6164 has been found to have an extensive, faint halo, revealed in blue in this deep telescopic image of the region. Expanding into the surrounding interstellar medium, the material in the blue halo was likely expelled from an earlier active phase of the O-star. NGC 6164 lies 4,200 light-years away in the southern constellation of the Carpenter's Square (Norma).

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orin stepanek
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Re: APOD: NGC 6164: Dragon's Egg Nebula and Halo (2022 Dec 26)

Post by orin stepanek » Mon Dec 26, 2022 12:39 pm

DragonsEgg_Croman_960.jpg
Hi! Just thought I would say that today's APOD kinda, sorta, reminds
me of a doggy's head! 8-) :wink:
Just noted this huge star could go nova in next 2-3 million years;
what a view that would be in the night's sky! 🤩
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Orin

Smile today; tomorrow's another day!

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VictorBorun
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Re: APOD: NGC 6164: Dragon's Egg Nebula and Halo (2022 Dec 26)

Post by VictorBorun » Mon Dec 26, 2022 7:25 pm

a bipolar symmetry?
I think I can see three jets:
Click to view full size image 1 or image 2
NGC 6164-1.jpg
NGC 6164-2.jpg
...
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Last edited by VictorBorun on Mon Dec 26, 2022 10:40 pm, edited 1 time in total.

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johnnydeep
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Re: APOD: NGC 6164: Dragon's Egg Nebula and Halo (2022 Dec 26)

Post by johnnydeep » Mon Dec 26, 2022 8:57 pm

Just to be clear, the link to the Wikipedia article about the book "Dragon's Egg" by Robert L. Forward is about a different star entirely: it is a neutron star only 50 lightyears away (not the 4000 ly of this nebula) at the 2020 date it is detected in the book. But it is still dubbed Dragon's Egg since it lies in the constellation Draco in the sky. The book is great, and it is perhaps my favorite hard sci-fi novel!
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}

beryllium732
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Re: APOD: NGC 6164: Dragon's Egg Nebula and Halo (2022 Dec 26)

Post by beryllium732 » Wed Dec 28, 2022 2:00 am

What would happen if we were on the edges of that gas cloud? Would it have any effect on the solar system? It obviously would if it goes super nova.