Recent comments in /f/space

danielravennest t1_j5kg3vg wrote

Reply to comment by FragleFameux in Rosette Nebula by Kujisann

The author's photography details has "color correction", so this isn't the original colors. This photo has no correction, just straight the way the camera took it.

The Rosette Nebula is part of a giant molecular cloud, about 5000 light years away. Hot young stars are exciting the molecules in the cloud, causing them to emit light, somewhat like neon lights in stores have the gas excited by electricity.

Red is typically from ionized hydrogen, the most common element in the Universe. The middle part of this hydrogen discharge tube shows the natural glowing color. Other colors come from other elements.

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Bipogram t1_j5kd2vd wrote

Reply to comment by xpietoe42 in Have you ever thought about what it sounds on jupiter by Western_Home6746

Only three qualities alter the speed of sound.

The mean molecular mass (ie, what the gas is made of) and temperature (and the ratio of specific heats, gamma). Pressure has no effect on speed of sound, but (of course) the density of a gas will dictate how much acoustic energy may be found.

Gravity influences the density profile of a gas, but that's all.

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xXijanlinXx t1_j5kc9le wrote

Reply to Have you ever thought about what it sounds on jupiter by Western_Home6746

It wouldn't as many people say, blow your ears out. while wind speeds do go up to 900 mph they generally hang around 200-400 mph, for reference the fastest wind speed on earth ever recorded was 231 mph. If you were to jump out of your capsule as it was falling, you would already be going a fast as the wind so would wouldn't be torn apart unless you were teleported in or something. because sounds get higher and quieter as pressure drops, and lower and louder as pressure rises, depending on how far from the 1 bar mark you are in the atmosphere you could hear pitch shifted hurricane noises, normal hurricane noises or nothing at all if you were too deep or too high.

Tldr: Depends on how high you are.

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Bipogram t1_j5kc8hr wrote

Reply to Have you ever thought about what it sounds on jupiter by Western_Home6746

>sounds on jupiter

Jupiter's a big place.

If you mean, what might it sound like at the point where the atrmospheric pressure is 1bar?

Lindal (1992) suggested that that's at a region where the temperature is 180K. I'd be cautious to expose my ear to 1bar gas at that temperature for long (is in, more than 1 s).

The Galileo probe carried no dedicated acoustic suite (alas).

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GolfballDM t1_j5ka9ol wrote

Reply to comment by Nrksbullet in Have you ever thought about what it sounds on jupiter by Western_Home6746

If you were not touching the surface of whatever body the tree fell on, it would not make a sound.

If you were touching the surface of the aforementioned body, there would be a sound. Sort of. You'd feel it through your feet (or whatever part of you was touching the surface), as opposed to hearing it through your ears.

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Tex-Rob t1_j5k99pj wrote

Reply to Have you ever thought about what it sounds on jupiter by Western_Home6746

I spend more time thinking about how so much of the universe isn't observable up close. I also spend a lot of time thinking about the big bang and how it applies to early life. If zero life existed, what are we measuring time with, and is the time where nothing was alive even relevant?

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