Is a Green Gas Giant Like Jool Possible? 

I have not said this explicitly in the video: Chlorine was the only green gas I found and thus the only thing I "tested". The conclusion that I should end with: The possibility of a green gas giant like Jool is near impossible. Theoretically may be possible, but due to the fact that Chlorine is not that abundant, green gas giants will not form, meaning that I deem it not possible: "Chlorine is a minor constituent of the Universe, with a solar abundance of only ∼3 × 10^−7 relative to hydrogen (Asplund et al. 2009)" For every 1 part of Hydrogen, there is 0,0000003 part Chlorine; in other words, there are around 3 million parts of Hydrogen for every 1 part of Chlorine. Other gasses that have been mentioned face the same problems. Abundance, or lack thereof... Edit: there are also more complicated molecules and substances that can influence color depending on a lot of variables. So maybe based on that, there might be a composition that would result in a green color. But due to the fact that there is a great amount of combinations, it would be something worth of a scientific paper to determine it, if there is indeed a solution at all.

It's not easy being green.

Another issue with chlorine is that it's really reactive, so jool's atmosphere would be devoid of gasses like hydrogen and methane if it is indeed chlorine giving it it's colour

You should do a video on how Ike formed around Duna. It's interesting how their almost binary planets and orbit close to each other, and are tidally locked to each other.

I always assumed it was some form of atmospheric life. Like little bacterium that inflate themselves with Jools gasses to be low density and float to the top like balloons where they slowly photosynthesize.

If your final theory is correct, that could aslo perhaps explain why Laith is warm enough to have liquid oceans, as perhaps some of the gases in Jool's atmosphere expell heat towards Laith. Just a theory lol

You actually mentioned the kraken farts haha.

[KSP 2 SPOILER ALERT] I think it´s algae in the athmosphere causing the green . BUT in ksp 2 jool has a solid surface (I had a high hope they made realistic gas gigants so I threw a probe into jool and just below the clouds is a surface) and the clouds have a kinda "grain" effect wich could be larger organisms flying around and feasting on the sunlight and gases in the athmosphere

Christ i just had a shower thought, what if chromium chloride dissolved in water droplets is what's giving Jool it's colour? Like chromium chloride is a deep vibrant green, so you wouldn't need a lot of it, its also quite stable, so it shouldn't react with anything and it's abundant enough, so that it could dye Jool green. Well there is a problem, that ammonia would react with it, forming chromium hydroxide, wich would sink, but IMO that's still better than chlorine, wich would react with everything.

Making videos no other ksp youtuber makes! Keep going, these informative videos are awesome!!!

I'm not sure if you have done this, but in ksp2 dres has small rings, how did they get formed? Also love your work keep it up!

kraken farts is my goto

Oh my god! I always wondered if it was possible, and I finally found a video about it!

giant Shrek planet

Congrats on 2k !

You just need enough space cows eating enough space grass

you explained the phase diagram better than my physics teacher, thanks to you, i finally understand the yellow lines(in your diagram), even if it is late. lol

What if the green is just blue+yellow? Would a mixture of e.g. methane (light blue, see Uranus) with something dark yellow (sulphur compounds?) work? Or maybe Jool is made of "glow in the dark"? :-P

I like the little cutouts of you. Very MatPat-like!

I like this

Very noice video

Fun fact if we put jool in our solar system it would not be considered giant becouse jool is almost as big as earth

What about liquid droplets or solid particulates as the causative agent? Or some form of structural color? What about effects of the host star's spectrum?

obviously jool is only green from the space program accidentally vaporizing so many kerbals near the upper atmosphere

There might be acid rains maybey?

This was released on my bday and jool is my favorite planet so

Putting aside the greenness of the planet, Jool, or a planet like it, couldn’t exist… because it’s canonically the size of Earth.

5:05 Kraken farts😂

Kraken farts is such a cool explenation.

What temerature do you think would Eeloo be? Because of tidal heating

Fun fact: Book is green because of Ariel algae (At least from I have heard)

sincw it was april fools i was expecting the "kraken farts" answer, was pleasantly surprised.

are there no other plausible green gasses?

I think it may be floating algea-like lifefoms

Interesting... I came up with a hypotheses that the green color comes from a thin haze of some sort of metal compound that gets pushed into the upper atmosphere of Jool by its intense winds. What are your thoughts on this?

only two weeks age he was only at 1000 subs, now 2.24k, keep up the science, i still have hundreds of hours to waste

Even if there was a way to replenish the upper atmosphere with gazeous chlorine, there would be chemical reactions between chlorine and hydrogene and other compounds, as chlorine is extremely reactive. But as said, so much chlorine on a gaz giant would not occur naturally, as chlorine is quite a rare element compared to hydrogen and helium.

Could radon be producing heat it’s heavier then methane so it would sink below That might also explain why laythe the closest moon to jool has enough heat to keep liquid water and life

In ksp2, i guess they confirmed that it is chlorine, since there is a surface now.

What if the clouds are made of chlorine ice crystals and that's what gives it the yellowish green hue?

Kraken farts. End of video

One thing to consider with the planets in KSP is that they're unrealistically small and in unrealistically small orbits. Everything's scaled down as a QoL feature for the game, so I wouldn't use planet size here as an argument.

What about arsenic and arsenic oxide?

Oh, I would have thought you would have put out a better idea after the further information...

what about ammonia-methane clouds (like Uranus and Neptune) being the reason why Jool is green, and it would probably need to be at the temperature of 150K which that would be the temperature at 150km on Jool

"kraken fart"

A yes, kraken farts

Also Jool is the size of the Earth

nono, my teacher has taught me long ago because i asked, turns out hydrogen can appear as different colors depending on temperature, anything other than yellow or pink theres a very specific temperature needed to make hydrogen appear green, if i can remember correctly it has to be higher than normal

Perhaps is very acid?

Wait what about tres 4b and trappist 1g

Idk

Chlorine is also far too reactive to be the potential source of the color.

it's possible AU Microscopii b is a green gas [or ice] giant and it's very young for gas giants to become green they must be hit by intense radiations just like this planet that's why Jool is green and it's orbiting a red dwarf star

There are other things besides chlorine that can make it green, You got to take into account things like ramen scattering, and whatever that other form of scattering is it makes the sky blue here. There's fluorescence of course. don't forget different ionization states ,I don't have a source off hand but I am told that nitrogen will create a green sky if heavily ionized with gamma rays... There is also various organic combinations like pearline green (you know the heavy polycyclic hydrocarbon) that could form in a very hot tar vapor atmosphere.. Not a place I'd like to visit boiling in hot tar is bad but being slowly vaporized by hot tar vapor is another.. That's not even covering the obvious things like copper or boron vapors. But if it was mostly copper there would probably be reds, browns, & black stripes in there too... Kerbals probably also have different retinas, it might be infrared they're perceiving as green... But that's probably beyond the scope of this video..

Blue gas giant smell bad does green smell......

Yeah it's possible, I've seen a picture of one in Elite Dangerous

kraken fart. definitely kraken fart

I could be wrong but the amount of supernovas to get that much chlorine on a gas giant is insane

A green compound perhaps?

It’s made of uranium powder

i think its made of Klorine (kerbals love the letter k)

Uranus comes pretty close though

I think i know whos getting a A++ in math

Next video im @curious about is why are Kerbals Green? And could we evolve with green skin color if we live on another planet?

its possible

fart gas

Since there're thousands of carbonhydrates, then one of them should be able to cause such effect.

1:55 next trip to France will be bigger ⬛️⬛️⬛️⬛️ ⬜️⬜️⬜️⬜️ > 🇫🇷 🟥🟥🟥🟥

🟢Some or most of Jool's chlorine could've formed when salt molecules on the surface of Jool were spilt apart when Jool's surface was exposed to a high radiation event (such as a gamma ray burst) to form sodium and chlorine.🟢

I'm gonna look for a green gas giant in Space Engine, since if my memory isn't failing me, I've discovered multiple green gas giants Edit: I've found a green gas giant, so it would be safe to say that green gas giants do exist in real life. I couldn't figure out what makes it green since there was like 50 types of molecules in its atmosphere for some reason, although some of the main molecules were: Hydrogen (92%), Helium (7.61%), Methane (0.291%), Nitrogen (324 ppm), and Ammonia (265 ppm).

neptune and ur-anus(the correct pronunciation) are ice giants not gas giants

Neptune and Uranus are not gas giants

WAIT hear me out here: kerbol is a red dwarf, red dwarves make a yellowish light jool is actually blue like uranus or neptune what do yellow and blue make: GREEN