Comments and questions about the
APOD on the main view screen.
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Boomer12k
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by Boomer12k » Mon Apr 20, 2020 4:20 am
So... it's...."Why did the chicken run around the galaxy?"...???
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Ann
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by Ann » Mon Apr 20, 2020 5:57 am
This is what the Running Chicken Nebula looks like to me,
with apologies to Marcus Davies, who took the picture
(minus the blue outline).
So the Thackaray globules (or Bok globules) of dark dust seen in the picture at right are like knobs of butter dropped into a hot frying pan, which should look something like
this.
The caption below the picture at right is from
Wikipedia.
Ann
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starsurfer
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by starsurfer » Mon Apr 20, 2020 10:17 am
For anyone wondering, the planetary nebula is Hen 2-72.
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neufer
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by neufer » Mon Apr 20, 2020 1:39 pm
Boomer12k wrote: ↑Mon Apr 20, 2020 4:20 am
So... it's...."Why did the chicken run around the galaxy?"...???
starsurfer wrote: ↑Mon Apr 20, 2020 10:17 am
For anyone wondering, the planetary nebula is Hen 2-72.
Which came first:
- 1) Running Chickens or
2) Running EGGs
https://en.wikipedia.org/wiki/Evaporating_gaseous_globule wrote:
<<An evaporating gas globule or EGG is a region of hydrogen gas in outer space approximately 100 astronomical units in size, such that gases shaded by it are shielded from ionizing UV rays. Dense areas of gas shielded by an evaporating gas globule can be conducive to the birth of stars. Evaporating gas globules were first conclusively identified via photographs of the Pillars of Creation in the Eagle Nebula taken by the Hubble Space Telescope in 1995.
EGG's are the likely predecessors of new protostars. Inside an EGG the gas and dust are denser than in the surrounding dust cloud. Gravity pulls the cloud even more tightly together as the EGG continues to draw in material from its surroundings. As the cloud density builds up the globule becomes hotter under the weight of the outer layers, a protostar is formed inside the EGG.
A protostar may have too little mass to become a star. If so it becomes a brown dwarf. If the protostar has sufficient mass, the density reaches a critical level where the temperature exceeds 10 million kelvin at its center. At this point, a nuclear reaction starts converting hydrogen to helium and releasing large amounts of energy. The protostar then becomes a star and joins the main sequence on the HR diagram.
A study of 73 EGGs in the Pillars of Creation (Eagle Nebula) with the Very Large Telescope showed that only 15% of the EGGs show signs of star-formation. The star-formation is not everywhere the same: The largest pillar has a small cluster of these sources at the head of the pillar.>>
Art Neuendorffer
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smitty
- Science Officer
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by smitty » Mon Apr 20, 2020 1:42 pm
I see a "small" chicken with a yellow beak located just where the blue transitions into the yellow and orange. The chicken is facing toward 11 o'clock. Amazing what the power of suggestion can do.
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Tszabeau
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by Tszabeau » Mon Apr 20, 2020 1:46 pm
I’m going with “Norwegian Blue”.
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orin stepanek
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by orin stepanek » Mon Apr 20, 2020 1:49 pm
Orin
Smile today; tomorrow's another day!
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orin stepanek
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by orin stepanek » Mon Apr 20, 2020 1:52 pm
Orin
Smile today; tomorrow's another day!
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johnnydeep
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by johnnydeep » Tue May 05, 2020 6:22 pm
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}
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Ann
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by Ann » Tue Dec 08, 2020 6:15 am
johnnydeep wrote: ↑Tue May 05, 2020 6:22 pm
The Running Chicken is easier to see in RGB. Although it does have a duck foot.
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