amazing science/nature images

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ukimalefu
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Post by ukimalefu »

Image

Liquid nitrogen in a bowl of gasoline

sorry, no more info or links at the source
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ukimalefu
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Post by ukimalefu »

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Post by Mustapha Mond »

The magnets and copper one was cool. :)
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Post by maurvir »

ukimalefu wrote: magnets and copper


I'm an EE, so I got what was happening immediately, but that was the coolest demonstration of those principles I have ever seen. Nice find! :up:
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Post by maurvir »

Image
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ukimalefu
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Post by ukimalefu »

Image

why isn't that more widely known?
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Post by maurvir »

ukimalefu wrote: Image

why isn't that more widely known?


Ok, that is cool, but does it help with bacteria? You can have clean looking water that will wreck your ass (literally and figuratively).
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dv
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Post by dv »

maurvir wrote:
ukimalefu wrote: Image

why isn't that more widely known?


Ok, that is cool, but does it help with bacteria? You can have clean looking water that will wreck your ass (literally and figuratively).


If the bacteria is too small for the "glue" to work, you can always put the "clean" water into another bottle w/ a little iodine. Or just drink it with a lifestraw.
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maurvir
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Post by maurvir »

dv wrote:
maurvir wrote:
ukimalefu wrote: Image

why isn't that more widely known?


Ok, that is cool, but does it help with bacteria? You can have clean looking water that will wreck your ass (literally and figuratively).


If the bacteria is too small for the "glue" to work, you can always put the "clean" water into another bottle w/ a little iodine. Or just drink it with a lifestraw.


Oh, I definitely think that product is cool. Having had to obtain water from sources that looked like that, or worse, on hiking trips, I would have loved that stuff. However, I hope they let people know what the limitations are.
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Post by dv »

maurvir wrote:
dv wrote:
maurvir wrote:
ukimalefu wrote: Image

why isn't that more widely known?


Ok, that is cool, but does it help with bacteria? You can have clean looking water that will wreck your ass (literally and figuratively).


If the bacteria is too small for the "glue" to work, you can always put the "clean" water into another bottle w/ a little iodine. Or just drink it with a lifestraw.


Oh, I definitely think that product is cool. Having had to obtain water from sources that looked like that, or worse, on hiking trips, I would have loved that stuff. However, I hope they let people know what the limitations are.


I'm sure they are. Doing otherwise would defeat the purpose of traveling halfway across the planet to help get people clean water.
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DEyncourt
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Post by DEyncourt »

Amateur astronomer happens to capture in photos first light from supernova in another galaxy:

Image


----------------------------------------------------------------------------^ "bottom-center-right", so I above here (?).

Of course that location will vary depending on your browser and default font.


Even more significant: because he was taking a series of short exposures (to prevent his camera-telescope combo from being overexposed due to city lights), his pics are basically the first EVER to capture the light from a supernova DURING its initial brightening.

Practically all such pics are long exposures so even if an astrophotographer happened to get such first light it would be overwhelmed by the later part of that exposure.

EDIT: DELeted my supposition on the supernova's location. See uki's post immediately below.
Last edited by DEyncourt on Fri Feb 23, 2018 9:01 pm, edited 1 time in total.
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Post by ukimalefu »

DEyncourt wrote: Amateur astronomer happens to capture in photos first light from supernova in another galaxy:

Image


----------------------------------------------------------------------------^ "bottom-center-right", so I above here (?).

Of course that location will vary depending on your browser and default font.

Even more significant: because he was taking a series of short exposures (to prevent his camera-telescope combo from being overexposed due to city lights), his pics are basically the first EVER to capture the light from a supernova DURING its initial brightening.

Practically all such pics are long exposures so even if an astrophotographer happened to get such first light it would be overwhelmed by the later part of that exposure.


you can see it pop in and out in the gif

Image

that's from your link

my question, why is the color inverted?
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Post by DEyncourt »

The pic wasn't animated in Safari when I first looked at it. Gizmodo changed it in between when I first looked at looked at it and now because they are different:
mine: ...s--xva0FQh0--/c_scale,fl_progressive,q_80,w_800/ktx0ehcvcd6wq4p0y6i3.jpg
yours: ...s--45dgxpXB--/c_scale,fl_progressive,q_80,w_800/ktx0ehcvcd6wq4p0y6i3.gif

Thanks for the correction.

SOMETIMES astrophotos are "left" inverted to help bring out details, though early on when astrophotography was first being developed astronomers just used the negative glass plates because making a "proper" photo had chances of introducing errors due to the (lack of) quality of the photographic paper, etc.

I think chances are that this amateur astrophotographer is using a film camera which makes negatives rather than a digital camera.
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Post by user »

you can certainly see the film grain
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Post by Aaron_R »

ukimalefu wrote: Image

why isn't that more widely known?

lol. the grandmother goes thats voodoo witchcraft and takes all her kids away with her
Its easy to know what you are against, quite an honour to know what you are for.
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Post by DEyncourt »

user wrote: you can certainly see the film grain

THAT is most likely due to one or more of several treatments to help make photographic film more light sensitive specifically for astrophotography, on top of the fact that these were also a considerable magnification of the original shots (thus blowing up the grain as well). According to Wikipedia, NGC 613 is about 5.2 minutes by 2.6 minutes in extent, so that wider measurement is about 1/6th the distance across the full Moon in the sky.
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Post by user »

So it's not digital. I stopped using film for scanning when I realized how much the grain affected the picture.
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Post by DukeofNuke »

Yeah, I thought it was too grainy to be digital, too.

then I thought, who the fiddlesticks uses film for astrophotography anymore?
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Post by ukimalefu »

DukeofNuke wrote: Yeah, I thought it was too grainy to be digital, too.

then I thought, who the fiddlesticks uses film for astrophotography anymore?


hipster astronomers?
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Post by Ribtor »

Sweet, sweet hipsters and their sweet, sweet film.

I can't think of any reason to use film unless there is something about the randomness of film grain that cancels itself out when viewed in successive images. That's why movies can be on film and fill huge screens.
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Post by ukimalefu »

"you're gonna need a bigger boat"

https://www.youtube.com/watch?v=N3ah_cuZdv0

I have trouble believing it's real

--


By the way, when typing the word "BIGGER", there's an easy typo to make that you'll probably not want to make, so proofread everything and learn to quickly spot the spell checker red squiggly line.
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Post by Mustapha Mond »

ukimalefu wrote: "you're gonna need a bigger boat"

https://www.youtube.com/watch?v=N3ah_cuZdv0

I have trouble believing it's real

--


By the way, when typing the word "BIGGER", there's an easy typo to make that you'll probably not want to make, so proofread everything and learn to quickly spot the spell checker red squiggly line.


The reactions of the news team, particularly because of their accents = :lol:
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Post by dv »

Mustapha Mond wrote:
ukimalefu wrote: "you're gonna need a bigger boat"

https://www.youtube.com/watch?v=N3ah_cuZdv0

I have trouble believing it's real

--


By the way, when typing the word "BIGGER", there's an easy typo to make that you'll probably not want to make, so proofread everything and learn to quickly spot the spell checker red squiggly line.


The reactions of the news team, particularly because of their accents = :lol:


The several seconds of gaping silence sold it.

"Stuff summer."
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ukimalefu
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Post by ukimalefu »

Luminol and Hydrogen Peroxyde

Image

I wonder how hard it would be to get some luminol...
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Post by ukimalefu »

Image
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Post by dv »

ukimalefu wrote: Image


Yup.

Dogs and cats will do something similar - if forced to walk through water, they'll shake off / lick off their front paws immediately and ignore their rear pair until later.
Image
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Post by macnuke »

I don't think anyone "Forced" him to do a dam thing.

People that do not succeed in politics usually tell the truth too often.

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Post by dv »

macnuke wrote: I don't think anyone "Forced" him to do a dam thing.


Even the most powerful of us can be victims of circumstance. :goth:
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Post by DukeofNuke »

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Post by ukimalefu »

Dumbo is real!
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Post by ukimalefu »

Image
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Post by macnuke »

Objects in mirror are inverted than they appear.
Nice one :up:

People that do not succeed in politics usually tell the truth too often.

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Post by maurvir »

ukimalefu wrote: Image


Even getting the trick, that is still a mesmerizing clip.
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Post by maurvir »

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Post by DukeofNuke »

that should be good for a hundred yards
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Post by user »

Image
Aw, he's no fun, he fell right over.

Science is Truth for Life. In FORTRAN tongue the Answer.

...so I'm supposed to find the Shadow King from inside a daiquiri?
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Post by maurvir »

Image
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Post by TOS »

wow! so well preserved! those planes especially ...
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