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(Mother Nature Network)   Not to alarm anyone, but the universe has a lot less ultraviolet light than previously thought   (mnn.com) divider line 50
    More: Scary  
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6664 clicks; posted to Main » on 14 Aug 2014 at 8:09 AM (4 weeks ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



50 Comments   (+0 »)
   
View Voting Results: Smartest and Funniest
 
2014-08-14 03:44:35 AM
Sooo, universe discos will be a little less glowy?
 
2014-08-14 03:56:18 AM
Damn, I bought all that sunblock for nothing.
 
2014-08-14 04:00:34 AM
What, you're telling me extrapolations based on extremely, extremely, extremely limited observations are less than accurate?
 
2014-08-14 04:41:34 AM
Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.
 
2014-08-14 04:47:40 AM

ecmoRandomNumbers: Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.


I have often wondered, do Irish people get sunburned in Ireland?
 
2014-08-14 07:43:11 AM
Damn. And to think how we squandered it on all those posters in the 1970's.
 
2014-08-14 08:01:00 AM
That explains all of the aliens with rickets.
 
2014-08-14 08:11:16 AM

MrBallou: Damn. And to think how we squandered it on all those posters in the 1970's.


came to say this. God damn stoners.
 
2014-08-14 08:11:25 AM
The explains why my Floyd posters aren't glowing.
 
2014-08-14 08:12:39 AM

Ambivalence: ecmoRandomNumbers: Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.

I have often wondered, do Irish people get sunburned in Ireland?


img.fark.net
 
2014-08-14 08:16:47 AM
Global warming or new ice age ?
 
2014-08-14 08:17:34 AM
Damn. I always fancied a bit of the old ultra-vi.
 
2014-08-14 08:19:19 AM

calbert: Ambivalence: ecmoRandomNumbers: Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.

I have often wondered, do Irish people get sunburned in Ireland?

[img.fark.net image 500x433]


like a ghost, it took me a minute to find her.


also, in other news.....

www.utrechtcentral.com
 
2014-08-14 08:20:48 AM
www.mnn.com
What?
 
2014-08-14 08:21:48 AM

Ambivalence: ecmoRandomNumbers: Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.

I have often wondered, do Irish people get sunburned in Ireland?


Don't be silly- the sun never shines in Ireland.

/at least it didn't the week I visited.
 
ZAZ [TotalFark]
2014-08-14 08:27:27 AM

I found the MNN article confusing. Here's the abstract of the actual paper:

We examine the statistics of the low-redshift Lyα forest from smoothed particle hydrodynamic simulations in light of recent improvements in the estimated evolution of the cosmic ultraviolet background (UVB) and recent observations from the Cosmic Origins Spectrograph (COS). We find that the value of the metagalactic photoionization rate (ΓHI) required by our simulations to match the observed properties of the low-redshift Lyα forest is a factor of five larger than the value predicted by state-of-the art models for the evolution of this quantity. This mismatch in ΓHI results in the mean flux decrement of the Lyα forest being overpredicted by at least a factor of two (a 10σ discrepancy with observations) and a column density distribution of Lyα forest absorbers systematically and significantly elevated compared to observations over nearly two decades in column density. We examine potential resolutions to this mismatch and find that either conventional sources of ionizing photons (galaxies and quasars) must contribute considerably more than current observational estimates or our theoretical understanding of the low-redshift universe is in need of substantial revision.
My first thought is "fix your model before asking us to fix the universe."
 
2014-08-14 08:29:41 AM
Duh. That's why they call it a black light.
 
2014-08-14 08:31:12 AM
Article seems to imply MORE UV than previously thought, based on the escape ratio and local ionized hydrogen. They just can't explain where it's coming from. Given that they're all super-smart sciency types, i hope they've accounted for the fact that hydrogen can be excited by other sources and EMIT light on 5 bands in the UV spectrum...
 
2014-08-14 08:34:47 AM
"This puzzle begins with hydrogen, the most common element in the universe, which makes up about 75 percent of known matter. High-energy ultraviolet light can convert electrically neutral hydrogen atoms into electrically charged ions. The two known sources for such ionizing rays are hot young stars and quasars, which are supermassive black holes more than a million times the mass of the sun that release extraordinarily large amounts of light as they rip apart stars and gobble matter."

Stopped reading there..

/..close, but no cigar..not your's..
 
2014-08-14 08:43:50 AM

Schmerd1948: Damn. I always fancied a bit of the old ultra-vi.


Came to say this
 
2014-08-14 08:50:07 AM

Ambivalence:
I have often wondered, do Irish people get sunburned in Ireland?


Not since they stopped putting skylights in taverns.
 
2014-08-14 08:53:54 AM
Since this is MNN, do they blame Monsanto and pesticides?
 
2014-08-14 08:56:39 AM
Does this mean I shouldn't bother painting my house with glow-in-the-dark paint? I'll ask my HOA.
 
2014-08-14 08:57:37 AM
So the hole in the ozone layer is actually needed and thats why jesus put it there. Liberals and thier satanic agenda wont ensnare me.
 
2014-08-14 09:02:07 AM
There are UV sinks in NJ...
4.bp.blogspot.com
 
2014-08-14 09:05:32 AM

CAT-LIKE TYPING DETECTED: Stopped reading there..

/..close, but no cigar..not your's..


What are you objecting to?

http://dictionary.reference.com/browse/quasar?s=t
quasar
/ˈkweɪzɑː; -sɑː/
noun
1.
any of a class of extragalactic objects that emit an immense amount of energy in the form of light, infrared radiation, etc, from a compact source. They are extremely distant and their energy generation is thought to involve a supermassive black hole located in the centre of a galaxy
 
2014-08-14 09:07:02 AM
Peak Ultraviolet?
 
2014-08-14 09:08:33 AM

Monkeyfark Ridiculous: Duh. That's why they call it a black light.


Or it can only be seen with a black light.
Hey, they can call it dark light, add it to one of their formulas and presto, we're whole again.
 
2014-08-14 09:10:37 AM
Is it me, or do they seem to be throwing the word, "crisis," around rather recklessly in that article? The fact is that the scientists don't seem to have any conclusive idea as to what's actually going on. There isn't nearly enough information right now to reach any conclusion more concrete than, "Huh. Well that's kinda strange..."

I mean, as one of them pointed out, dark matter decay could have some potentially-maybe-not-great implications, but there's no conclusive evidence to support that that's the case. For all we know, some jackass just forgot to carry the 1...
 
2014-08-14 09:10:54 AM

Fark like a Barsoomian: [www.mnn.com image 644x294]
What?


Yeah, I mean, where it the picture of English Lit
 
2014-08-14 09:17:10 AM
why hasn't anyone made the connection yet?

img.fark.net
img.fark.net
 
2014-08-14 09:17:15 AM
Does this make the universe a gloomy place?
 
2014-08-14 09:18:00 AM
Meh.  Interesting result, but hardly a catastrophe.
 
2014-08-14 09:23:56 AM
Bees depend on UV light so, when some of it goes missing, it causes the colony collapse problem.

img2.wikia.nocookie.net
 
2014-08-14 09:39:42 AM
So, Aliens?
 
2014-08-14 09:52:53 AM

ZAZ: My first thought is "fix your model before asking us to fix the universe."



Yup. We snicker at the heliocentrists for all the epicycles they had to add to get their model to fit observations, but it's fine for modern cosmologists to add huge quantities of mysteriously invisible mass, and mysteriously undetectable energy in a desperate attempt to cling on to their models.
 
2014-08-14 09:57:21 AM
The science is settled, Subdenier. It's been peer reviewed and everything.
 
2014-08-14 09:57:33 AM

LoneVVolf: Article seems to imply MORE UV than previously thought, based on the escape ratio and local ionized hydrogen. They just can't explain where it's coming from. Given that they're all super-smart sciency types, i hope they've accounted for the fact that hydrogen can be excited by other sources and EMIT light on 5 bands in the UV spectrum...


I read it as "we have all this light but no idea where it's coming from"
 
2014-08-14 10:03:37 AM
img.fark.net
 
2014-08-14 10:38:01 AM

MrBallou: Damn. And to think how we squandered it on all those posters in the 1970's.


I am SO angry that I couldn't come up with anything this funny.
 
2014-08-14 10:39:39 AM
How can we see cats urine in space wo uv light?
 
2014-08-14 11:01:25 AM
So, Science keeps changing.

/shocked face
 
2014-08-14 11:06:02 AM
What do you mean?

upload.wikimedia.org
 
2014-08-14 11:18:21 AM

generallyso: CAT-LIKE TYPING DETECTED: Stopped reading there..

/..close, but no cigar..not your's..

What are you objecting to?

http://dictionary.reference.com/browse/quasar?s=t
quasar
/ˈkweɪzɑː; -sɑː/
noun
1.
any of a class of extragalactic objects that emit an immense amount of energy in the form of light, infrared radiation, etc, from a compact source. They are extremely distant and their energy generation is thought to involve a supermassive black hole located in the centre of a galaxy



What a supermassive black hole looks like
www.trouveztout.org

Which is similar to a blackhole sun
upload.wikimedia.org
 
2014-08-14 12:04:05 PM

ltdanman44: calbert: Ambivalence: ecmoRandomNumbers: Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.

I have often wondered, do Irish people get sunburned in Ireland?

[img.fark.net image 500x433]

like a ghost, it took me a minute to find her.


also, in other news.....

[www.utrechtcentral.com image 850x425]


you mean like dark matter ? and dark energy ?
 
2014-08-14 12:16:39 PM

calbert: Ambivalence: ecmoRandomNumbers: Good, because I'm sick of putting on sunblock at night.

Stupid Irish skin.

I have often wondered, do Irish people get sunburned in Ireland?

[img.fark.net image 500x433]


Holy crap, that's white.
 
2014-08-14 12:32:54 PM

generallyso: CAT-LIKE TYPING DETECTED: Stopped reading there..

/..close, but no cigar..not your's..

What are you objecting to?

http://dictionary.reference.com/browse/quasar?s=t
quasar
/ˈkweɪzɑː; -sɑː/
noun
1.
any of a class of extragalactic objects that emit an immense amount of energy in the form of light, infrared radiation, etc, from a compact source. They are extremely distant and their energy generation is thought to involve a supermassive black hole located in the centre of a galaxy


Black holes create quasars. Quasars are not black holes.

The two known sources for such ionizing rays are hot young stars and quasars, which are supermassive black holes more than a million times the mass of the sun that release extraordinarily large amounts of light as they rip apart stars and gobble matter."

They might have left out the words "created by".
 
2014-08-14 12:40:22 PM
So have we reached "Peak Lighting?"
 
2014-08-14 01:04:40 PM
So albinos can go to the beach now?
 
2014-08-14 03:08:45 PM
Ultraviolet catastrophe!
 
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