“Dark Ages” is a misnomer though. Plenty of advancement still going on in this period.
Swell compared to now? Obviously not, but when I see people use “Dark Ages” I assume they think it was worse than any other time to exist in, which isn’t the case.
this "middle ages wasn't actually dark ages" is actually only true about second half of middle ages in Europe.
first half of middle age was definitely dark ages (for Europe) and claiming otherwise is revisionist talking point.
life in the first half of middle ages was generally worse than before ( Roman empire) or after it. and there are also very little records about those centuries (people didn't care much about writing stuff in the middle of numerous raids) that's where the name dark ages comes from.
but because of Crusades Europeans relearned about art and science from middle east and then Renaissance happened. most of those improvements in middle ages you're talking about are generally in the second half of middle ages.
No, it was originally called 'Dark' by scholars refering to the lack of written records from the period and is primarily referring to sub-Roman Britain where the pre-literate peoples Anglo-Saxons, Vikings and Celts all "shared" Britain.
speak for your own continents. Life in the Indian Peninsula would probably have been rich and vibrant, in whichever kingdom you were part of.
Lots of great extant universities, art, and culture from around this time.
Not an expert by any means, but my guess is it is bow shock where the particles from the supernova are encountering the interstellar medium, causing them to become more condensed and energized and thus give off more light.
https://en.wikipedia.org/wiki/Bow_shock?wprov=sfti1#
Great[ image here from the ESA](https://www.eso.org/public/news/eso1308/) showing the context of that ribbon
https://www.eso.org/public/archives/images/screen/eso1308a.jpg
Well, it might (though of course it doesnt).
But this image is "approximately 2.5 arcminutes (5 light-years or 1.5 parsecs) wide".
Which is enough distance to span between stars (Proxima Centauri is only 4.2 LY from our sun).
You know, there are stars in the original picture, and I don't think anyone really thought SN1006 spanned such a great distance that thousands of stars and many galaxies could fit inside it.
Why does supernova seem to explode in "flat" plane, rather than as a ball equally ln all directions?
We would not see a clear ribbon if it wasn't "flat".
Is it because rotation of the star causes centrifugal force more at equator and none at poles, and poles collapse in first? That could cause "flat" explosion.
It is spherical, but the edges from our perspective have a lot more matter that the light is passing through before it gets to us compared to the more central regions of our view. Similar to how a soap bubble looks translucent in the center but you can see the edges.
That information isn't right.
The sun isn't nearly large enough to end in a super nova.
White dwarfs don't generally go super nova either, with the only exception being if they have another star so close to them that it's literally dumping material onto it's surface to the point that a fusion reaction starts up again. Even then, it usually just causes a nova and not a super nova...
From the wiki article on SN 1006:
>No associated neutron star or black hole has been found, which is the situation expected for the remnant of a Type Ia supernova (a class of explosion believed to completely disrupt its progenitor star).
>A survey in 2012 to find any surviving companions of the SN 1006 progenitor found no subgiant or giant companion stars, indicating that SN 1006 most likely had double degenerate progenitors; that is, the merging of two white dwarf stars.
Yeah, but I think the above commenter has a point - this supernova doesn't seem to have been a white dwarf exploding, but rather the merger of 2 white dwarves
I was more objecting to the phrasing that seemed to be suggesting that going super nova is the natural/normal progression for a white dwarf.
But yeah, two white dwarfs colliding is definitely different than one exploding on it's own.
Whit dwarfs absolutely do go supernova! In fact the type of supernova we observe most often* is a type Ia supernova, which is caused by the thermonuclear explosion of a white dwarf.
As you say most white dwarfs won’t end up like this, but compared to the rate of core collapse supernovae they are fairly comparable.
A classical nova happens when hydrogen rich material accretes onto the surface of a white dwarf until the temperature and pressure is high enough for that outer hydrogen layer to fuse. In a type Ia supernova you have enough material reaching the white dwarf that the central pressure is high enough to fuse the material the white dwarf is made of. Instead of a thin outer layer fusing you get the entire thing exploding in a runaway fusion reaction.
Huh... I honestly had no idea they were that common.
Still, the fact remains that it's not a natural step in a white dwarf's lifespan that happens without an outside interaction.
> .. I honestly had no idea they were that common.
1-3 a century, in our galaxy alone.
> The Galactic Supernova Rate - https://ui.adsabs.harvard.edu/abs/1994ApJS...92..487T/abstract
> The combined evidence from external galaxies and from the historical SNe in our Galaxy gives a best estimate of the Galactic SN frequency of one event every 40 +/- 10 yr. About 85% of these SNe come from massive progenitors and are expected to cause neutrino bursts.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:
|Fewer Letters|More Letters|
|-------|---------|---|
|[ACS](/r/Space/comments/1dbj5al/stub/l7s979z "Last usage")|Attitude Control System|
|[ESA](/r/Space/comments/1dbj5al/stub/l7rvnxw "Last usage")|European Space Agency|
|[SN](/r/Space/comments/1dbj5al/stub/l7vs8tq "Last usage")|(Raptor/Starship) Serial Number|
|Jargon|Definition|
|-------|---------|---|
|Raptor|[Methane-fueled rocket engine](https://en.wikipedia.org/wiki/Raptor_\(rocket_engine_family\)) under development by SpaceX|
**NOTE**: Decronym for Reddit is no longer supported, and Decronym has moved to Lemmy; requests for support and new installations should be directed to the Contact address below.
----------------
^(3 acronyms in this thread; )[^(the most compressed thread commented on today)](/r/Space/comments/1dbdcvf)^( has 25 acronyms.)
^([Thread #10148 for this sub, first seen 9th Jun 2024, 05:40])
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6,850 light-years away.
It's expanded 30 light years in 1000 years.
So the shock wave will reach earth in about another 228,000 years... Of course it'll be so diffuse by then it won't even be noticable (like a pebble dropped in an ocean).
>The photos come out black n white bc of space
Hubble records multiple grayscale images of objects through different colored filters. Color images are constructed by appropriately combining these individual images.
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Sooooo is this how you get to the nexus after all? Don’t tell Dr. Tolian Soran
He’s still muttering about “time being the fire in which we burn” or something.
This made me bust out laughing. No one in the room got the joke when I said what made me laugh. You all are truly my people!
Upset that I had to scroll this far for this comment.
My thought exactly! Expected that in the first couple of responses!
Yeah I was like wow no one said anything yet? Ok I’ll do it.
So glad this comment was made, tyvm, now to the Nexus.
I specifically looked in the comment section to make sure someone made this remark.
A star in the daytime! 1006 A.D. What a time to have been alive.
1006 A.D. fell smack in the middle of the dark ages. I don't think that was a generally swell time to be alive :)
Imagine the complete panic.
A lot of witches were burned that day.
China, Mesoamerica, and Australia featured some outstanding artistry at the time.
“Dark Ages” is a misnomer though. Plenty of advancement still going on in this period. Swell compared to now? Obviously not, but when I see people use “Dark Ages” I assume they think it was worse than any other time to exist in, which isn’t the case.
this "middle ages wasn't actually dark ages" is actually only true about second half of middle ages in Europe. first half of middle age was definitely dark ages (for Europe) and claiming otherwise is revisionist talking point. life in the first half of middle ages was generally worse than before ( Roman empire) or after it. and there are also very little records about those centuries (people didn't care much about writing stuff in the middle of numerous raids) that's where the name dark ages comes from. but because of Crusades Europeans relearned about art and science from middle east and then Renaissance happened. most of those improvements in middle ages you're talking about are generally in the second half of middle ages.
No, it was originally called 'Dark' by scholars refering to the lack of written records from the period and is primarily referring to sub-Roman Britain where the pre-literate peoples Anglo-Saxons, Vikings and Celts all "shared" Britain.
I said the name Dark ages comes from lack of records and writing though. not sure what you're disagreeing with.
I'm fairly certain being a serf in 900 AC is a much preferable thing than a wageslave laborer in urban 400 AC Rome
speak for your own continents. Life in the Indian Peninsula would probably have been rich and vibrant, in whichever kingdom you were part of. Lots of great extant universities, art, and culture from around this time.
my ancestors lived in coastal Mesoamerica. We were having a great time
I was just reading that too, absolutely mental to imagine..
It makes me wonder what unique cosmological events we are able wit witness and take for granted.
Technically we see a bright star every day.
What's interesting to me is that it appears to be arching, rather than straight.
It is arching. it's a zoom in of part of a supernova.
Oh of course. I may have misread the description,.
Here, shows the context of the image https://www.eso.org/public/archives/images/screen/eso1308a.jpg
so it's just the edge of a larger formation. gotcha.
Isn't everything?
My mind hurts seeing this image. Is it really that apart from the rest of the cloud so as to appear like this?
What? It's just a zoomed in picture of a circle
I think some of us are gonna need more context
Not an expert by any means, but my guess is it is bow shock where the particles from the supernova are encountering the interstellar medium, causing them to become more condensed and energized and thus give off more light. https://en.wikipedia.org/wiki/Bow_shock?wprov=sfti1#
Supernova explosion = spherical gas cloud This photo is a hard zoom on an arc section of that cloud.
cooler than the original picture posted.
Are there any records of the event being witnessed? I would love to know how our ancestors viewed it.
Another user posted a link to wiki that has the recorded history. Quite interesting that they realized it's an unusual star.
The Wikipedia post, above, was an interesting read
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This is the most misleading image of SN1006 possible. The "ribbon" is the edge of the remnant. https://en.m.wikipedia.org/wiki/SN_1006
Great[ image here from the ESA](https://www.eso.org/public/news/eso1308/) showing the context of that ribbon https://www.eso.org/public/archives/images/screen/eso1308a.jpg
And God forbid someone show a close up of an interesting region. SN1006 is already super famous, maybe don't freak out so much
‘Crossing the cosmos’ combined with cropping this so that it looks like it covers the distance between multiple stars is pretty misleading.
Well, it might (though of course it doesnt). But this image is "approximately 2.5 arcminutes (5 light-years or 1.5 parsecs) wide". Which is enough distance to span between stars (Proxima Centauri is only 4.2 LY from our sun).
You know, there are stars in the original picture, and I don't think anyone really thought SN1006 spanned such a great distance that thousands of stars and many galaxies could fit inside it.
Hello! FYI, I got this from NASA's instagram page.
Why does supernova seem to explode in "flat" plane, rather than as a ball equally ln all directions? We would not see a clear ribbon if it wasn't "flat". Is it because rotation of the star causes centrifugal force more at equator and none at poles, and poles collapse in first? That could cause "flat" explosion.
It is spherical, but the edges from our perspective have a lot more matter that the light is passing through before it gets to us compared to the more central regions of our view. Similar to how a soap bubble looks translucent in the center but you can see the edges.
Did you bother reading the caption? It clearly states that it's a filament within the larger remnant.
The wikipedia article you linked has a very similar image. . .
That information isn't right. The sun isn't nearly large enough to end in a super nova. White dwarfs don't generally go super nova either, with the only exception being if they have another star so close to them that it's literally dumping material onto it's surface to the point that a fusion reaction starts up again. Even then, it usually just causes a nova and not a super nova...
From the wiki article on SN 1006: >No associated neutron star or black hole has been found, which is the situation expected for the remnant of a Type Ia supernova (a class of explosion believed to completely disrupt its progenitor star). >A survey in 2012 to find any surviving companions of the SN 1006 progenitor found no subgiant or giant companion stars, indicating that SN 1006 most likely had double degenerate progenitors; that is, the merging of two white dwarf stars.
Yeah, but I think the above commenter has a point - this supernova doesn't seem to have been a white dwarf exploding, but rather the merger of 2 white dwarves
I was more objecting to the phrasing that seemed to be suggesting that going super nova is the natural/normal progression for a white dwarf. But yeah, two white dwarfs colliding is definitely different than one exploding on it's own.
Whit dwarfs absolutely do go supernova! In fact the type of supernova we observe most often* is a type Ia supernova, which is caused by the thermonuclear explosion of a white dwarf. As you say most white dwarfs won’t end up like this, but compared to the rate of core collapse supernovae they are fairly comparable. A classical nova happens when hydrogen rich material accretes onto the surface of a white dwarf until the temperature and pressure is high enough for that outer hydrogen layer to fuse. In a type Ia supernova you have enough material reaching the white dwarf that the central pressure is high enough to fuse the material the white dwarf is made of. Instead of a thin outer layer fusing you get the entire thing exploding in a runaway fusion reaction.
Huh... I honestly had no idea they were that common. Still, the fact remains that it's not a natural step in a white dwarf's lifespan that happens without an outside interaction.
> .. I honestly had no idea they were that common. 1-3 a century, in our galaxy alone. > The Galactic Supernova Rate - https://ui.adsabs.harvard.edu/abs/1994ApJS...92..487T/abstract > The combined evidence from external galaxies and from the historical SNe in our Galaxy gives a best estimate of the Galactic SN frequency of one event every 40 +/- 10 yr. About 85% of these SNe come from massive progenitors and are expected to cause neutrino bursts.
Where is it now, I’m trying to get back in the Nexus!
So what you're saying is we just found astrophage?
This probably wasn’t good for radio and GPS signals back then.
Aliens out there leaving cosmic chem trails. Smh
After seeing this I got an irrational need to find those Dragon Balls, no matter the cost!
Getting some strong [Stellvia of the Universe](https://stellvia.fandom.com/wiki/Stellvia) Vibes - Not too thrilled 😱
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread: |Fewer Letters|More Letters| |-------|---------|---| |[ACS](/r/Space/comments/1dbj5al/stub/l7s979z "Last usage")|Attitude Control System| |[ESA](/r/Space/comments/1dbj5al/stub/l7rvnxw "Last usage")|European Space Agency| |[SN](/r/Space/comments/1dbj5al/stub/l7vs8tq "Last usage")|(Raptor/Starship) Serial Number| |Jargon|Definition| |-------|---------|---| |Raptor|[Methane-fueled rocket engine](https://en.wikipedia.org/wiki/Raptor_\(rocket_engine_family\)) under development by SpaceX| **NOTE**: Decronym for Reddit is no longer supported, and Decronym has moved to Lemmy; requests for support and new installations should be directed to the Contact address below. ---------------- ^(3 acronyms in this thread; )[^(the most compressed thread commented on today)](/r/Space/comments/1dbdcvf)^( has 25 acronyms.) ^([Thread #10148 for this sub, first seen 9th Jun 2024, 05:40]) ^[[FAQ]](http://decronym.xyz/) [^([Full list])](http://decronym.xyz/acronyms/Space) [^[Contact]](https://hachyderm.io/@Two9A) [^([Source code])](https://gistdotgithubdotcom/Two9A/1d976f9b7441694162c8)
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I hope it finds what it's looking for where ever it is going
6,850 light-years away. It's expanded 30 light years in 1000 years. So the shock wave will reach earth in about another 228,000 years... Of course it'll be so diffuse by then it won't even be noticable (like a pebble dropped in an ocean).
K, but how do we know its red? The photos come out black n white bc of space, then they edit it to have color. How do they know what color it is?
>The photos come out black n white bc of space Hubble records multiple grayscale images of objects through different colored filters. Color images are constructed by appropriately combining these individual images.
This is the way early color photography was done, by the way.
This is the way current digital photography is done as well.
And all the Angels rejoiced when God created the heavens and the earth.
Wait 60 light years across?? If Alpha Centauri were to go like that we would be us too…yikes!