APOD: Cometary Globules (2013 Oct 12)

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APOD: Cometary Globules (2013 Oct 12)

Post by APOD Robot » Sat Oct 12, 2013 4:05 am

Image Cometary Globules

Explanation: Bright-rimmed, flowing shapes gather near the center of this rich starfield toward the boarders of the nautical southern constellations Pupis and Vela. Composed of interstellar gas and dust, the grouping of light-year sized cometary globules is about 1300 light-years distant. Energetic ultraviolet light from nearby hot stars has molded the globules and ionized their bright rims. The globules also stream away from the Vela supernova remnant which may have influenced their swept-back shapes. Within them, cores of cold gas and dust are likely collapsing to form low mass stars, whose formation will ultimately cause the globules to disperse. In fact, cometary globule CG30 (upper right in the group) sports a small reddish glow near its head, a telltale sign of energetic jets from a star in the early stages of formation.

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Ann » Sat Oct 12, 2013 5:17 am

This is a fascinating and beautiful image. The objects look downright mysterious, as if they were a gathering of spirits wandering the vastness of the universe. In reality, of course, they are just a fragmented cloud of gas and dust being sculpted by the ultraviolet radiation and stellar wind of one or more hot stars.

As for the colors (since I am the self-appointed color commentator), they look a little different from those seen in most portraits of cometary globules today. But as far as I can understand, Robert Gendler has used old blue and red photographic plates of this region and then combined the plates into this image. This process is different from how most images are made today, which explains why they look different. But in any case, the red parts of the globules certainly glow red from Ha emission, the most common red color in the universe. The globules give off this red light as hydrogen in them is being ionized by the hot stars that sculpted these globules in the first place.

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by orin stepanek » Sat Oct 12, 2013 11:24 am

Baby stars in the making! :wink: :D
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Smile today; tomorrow's another day!

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by WWW » Sat Oct 12, 2013 1:07 pm

You buried the lead: Starfield has boarders? That's the real news here.

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by geckzilla » Sat Oct 12, 2013 2:26 pm

WWW wrote:You buried the lead: Starfield has boarders? That's the real news here.
They're getting on at Puppis (the poop deck). Amazingly, neither Beyond nor Art have noticed this accidental pun yet.
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by neufer » Sat Oct 12, 2013 3:20 pm

geckzilla wrote:
WWW wrote:
You buried the lead: Starfield has boarders? That's the real news here.
They're getting on at Puppis (the poop deck).
Amazingly, neither Beyond nor Art have noticed this accidental pun yet.
You're a stern task master, Geck :!:

http://asterisk.apod.com/viewtopic.php? ... op#p176679
http://asterisk.apod.com/viewtopic.php? ... oop#p91305
http://en.wikipedia.org/wiki/Poop_deck wrote:
<<In naval architecture, a poop deck is a deck that forms the roof of a cabin built in the rear, or "aft", part of the superstructure of a ship. The name originates from the French word for stern, la poupe, from Latin puppis. Thus the poop deck is technically a stern deck, which in sailing ships was usually elevated as the roof of the stern or "after" cabin, also known as the "poop cabin". In sailing ships, with the helmsman at the stern, an elevated position was ideal for both navigation and observation of the crew and sails.>>
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Beyond » Sat Oct 12, 2013 5:05 pm

I have no Cometary. I'm just waiting for the stern task master to tell the captain, so he'll order the boarders to walk the Planck and disappear.
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by LocalColor » Sat Oct 12, 2013 5:09 pm

Ann wrote:This is a fascinating and beautiful image. The objects look downright mysterious, as if they were a gathering of spirits wandering the vastness of the universe. In reality, of course, they are just a fragmented cloud of gas and dust being sculpted by the ultraviolet radiation and stellar wind of one or more hot stars.
....
Ann
And a beautiful description of a wonderful image of our strange and amazing universe!

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Chris Peterson » Sat Oct 12, 2013 5:13 pm

LocalColor wrote:And a beautiful description of a wonderful image of our strange and amazing universe!
Amazing? Absolutely! Strange? I'd say not. The Universe is quite ordinary. What else could it be? Only the imaginary worlds we create in our mythology and literature qualify as "strange".
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Strange new worlds

Post by neufer » Sat Oct 12, 2013 5:32 pm

Chris Peterson wrote:
LocalColor wrote:
And a beautiful description of a wonderful image of our strange and amazing universe!
Amazing? Absolutely! Strange? I'd say not. The Universe is quite ordinary. What else could it be? Only the imaginary worlds we create in our mythology and literature qualify as "strange".
There you go again, Chris. Just being contrary.

Everything natural that is taking place on a different scale from our normal everyday experiences
(including all the microscopic creatures that inhabit our bodies) is by definition STRANGE.
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Re: Strange new worlds

Post by Chris Peterson » Sat Oct 12, 2013 5:39 pm

neufer wrote:Everything natural that is taking place on a different scale from our normal everyday experiences
(including all the microscopic creatures that inhabit our bodies) is by definition STRANGE.
Not to me. Not by my definition.
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Boomer12k » Sat Oct 12, 2013 9:00 pm

It is a Gnome wearing a Hat....


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Re: Strange new worlds

Post by owlice » Sat Oct 12, 2013 9:34 pm

Chris Peterson wrote:
neufer wrote:Everything natural that is taking place on a different scale from our normal everyday experiences
(including all the microscopic creatures that inhabit our bodies) is by definition STRANGE.
Not to me. Not by my definition.
Ah, but that's just strange. :D
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Ann » Sun Oct 13, 2013 5:43 am

I think it is kind of amazing to think that WE - or the specific life forms on Earth - are so unique. At least I'm convinced that all the multicellular life forms that have ever existed on the Earth are unique to this planet. So take a look around, and consider the fact that it took the entire universe to make you, your kids, your cat, your dog, and your aspidistra.

If that isn't strange, then at least it really is amazing.

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Beyond » Sun Oct 13, 2013 10:08 am

But... but.. Ann, i don't have an aspidistra :!:
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You didn't make that!

Post by neufer » Sun Oct 13, 2013 12:49 pm

Click to play embedded YouTube video.
Ann wrote:
I think it is kind of amazing to think that WE - or the specific life forms on Earth - are so unique. At least I'm convinced that all the multicellular life forms that have ever existed on the Earth are unique to this planet. So take a look around, and consider the fact that it took the entire universe to make you, your kids, your cat, your dog, and your aspidistra.

If that isn't strange, then at least it really is amazing.
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Chris Peterson » Sun Oct 13, 2013 2:18 pm

Ann wrote:I think it is kind of amazing to think that WE - or the specific life forms on Earth - are so unique. At least I'm convinced that all the multicellular life forms that have ever existed on the Earth are unique to this planet. So take a look around, and consider the fact that it took the entire universe to make you, your kids, your cat, your dog, and your aspidistra.

If that isn't strange, then at least it really is amazing.
To me it seems inevitable, not amazing. And outside of atoms, individual molecules, and elementary particles, everything in the Universe is unique!
Chris

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by stephen63 » Sun Oct 13, 2013 3:19 pm

Chris Peterson wrote:
Ann wrote:I think it is kind of amazing to think that WE - or the specific life forms on Earth - are so unique. At least I'm convinced that all the multicellular life forms that have ever existed on the Earth are unique to this planet. So take a look around, and consider the fact that it took the entire universe to make you, your kids, your cat, your dog, and your aspidistra.

If that isn't strange, then at least it really is amazing.
To me it seems inevitable, not amazing. And outside of atoms, individual molecules, and elementary particles, everything in the Universe is unique!
What's amazing is the fact that we are confined to a habitable zone of approximately 5 1/2 km in altitude, outside of which we would quickly perish. Beyond that little zone, the next livable place is how many trillion km away? I would consider our little planet to be amazing and unique indeed.

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by neufer » Sun Oct 13, 2013 3:50 pm

Click to play embedded YouTube video.
stephen63 wrote:
What's amazing is the fact that we are confined to a habitable zone of approximately 5 1/2 km in altitude, outside of which we would quickly perish. Beyond that little zone, the next livable place is how many trillion km away? I would consider our little planet to be amazing and unique indeed.
Without clothes or spacesuits it is even more restricting.

With clothes & spacesuits it is less restricting.
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Beyond » Sun Oct 13, 2013 5:24 pm

We're all just a bunch of landlubbers. A few, go here and a few go there, but never very far away from the land called earth.
To find the Truth, you must go Beyond.

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Re: APOD: Cometary Globules (2013 Oct 12)

Post by neufer » Sun Oct 13, 2013 7:05 pm

Beyond wrote:
We're all just a bunch of landlubbers.

A few, go here and a few go there, but never very far away from the land called earth.
Face it, Beyond... We're just sedentary globules.
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Beyond » Sun Oct 13, 2013 7:39 pm

neufer wrote:
Beyond wrote:
We're all just a bunch of landlubbers.

A few, go here and a few go there, but never very far away from the land called earth.
Face it, Beyond... We're just sedentary globules.
Alas, we're but sedentary globules of mostly water, evaporating s-l-o-w-l-y away.
To find the Truth, you must go Beyond.

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Re: Strange new worlds

Post by geckzilla » Mon Oct 14, 2013 4:10 pm

owlice wrote:
Chris Peterson wrote:
neufer wrote:Everything natural that is taking place on a different scale from our normal everyday experiences
(including all the microscopic creatures that inhabit our bodies) is by definition STRANGE.
Not to me. Not by my definition.
Ah, but that's just strange. :D
Astronomy through a microscope?
Image
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Beyond » Mon Oct 14, 2013 7:46 pm

For some reason, i wasn't quite latching onto the meaning of the sizes. Then i got to the Voyagers ... oh yeah. Also interesting what he said about algorithms. Who's Jeeves :?:
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Re: APOD: Cometary Globules (2013 Oct 12)

Post by Nitpicker » Wed Oct 16, 2013 2:15 am

geckzilla wrote: Astronomy through a microscope?
Image
I've saved this for reference. Next time I travel to the centre of the Earth to observe celestial objects, it may come in handy.

If the Earth were see-through, then from my house, I could look down at my feet, and a bit off to one side I would see Florida (the visible bits at least). It would appear roughly three inches long on my floor, and I could cover it with my foot.

I'm a dot ...

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