In this tv series a woman from Japanese Nasa says:
Sound doesn't travel through space.

WTH? If sound doesn't travel through space then why did the US put a recording on the moon that is playing non-stop? Which I think is utterly stupid btw, but that's another discussion.

Sound cannot travel in a vacuum. Radio transmissions can be sent and received

Ah, okay. Thank you for clarifying :)

Radio transmission is radio wave on electromagnetic spectrum, just like visible light, ultraviolet, gamma and all of them travel at speed of light on a vacuum. Sound is just vibration of particles in air or another atmosphere.
If there is vacuum, there is no enough particles to vibrate, so there is no sound.

I really never knew. Not that I thought there'd be sound in space per say, but still... It's such a weird concept, no sound.
So you could -hypothetically- scream and nothing would be heard.

yes, you wouldn't hear anything.

It is very interesting series "The Expance" which is based on the real world physics, by real astrophysics.

I can recommend you a documentaries series "Cosmos: A Spacetime Odyssey" by Neil de Grasse Tyson.

Sound as we hear it are pressure waves which strike our ears.
Sound itself is vibration at frequency waves.

Sound still happens in space.
If a distant asteriod collides with another it does make a sound because the vibration is present. You can't hear it because there is nothing for the vibration to change creating a pressure wave our ears can detect.

Space is very noisy, we just can't hear it with our ears unless we turn it into something that can create a pressure wave, like a speaker.

Here is a video of the actual sounds of our solar system, including the Sun.
All Planet Sounds From Space (In our Solar System)
http://www.youtube.com/watch?v=IQL53eQ0cNA

Here's another interesting space sound video

The Sounds of Space: A sonic adventure to other worlds
http://www.youtube.com/watch?v=OeYnV9zp7Dk

Another misrepresented space condition in movies and shows is aerodynamic manuevers.
You see space ships and space fighters bank and turn but that can't happen in space because there is nothing to deflect the surfaces.

Spaceships with wings that never enter an atmosphere are a useless waste of resources.

The most efficient spaceships would be spheres.

Coarse corrections in space need not be forward directional changes. Thrusting on a side vector or ventral vector while moving in a direction would change the craft's heading without reorienting the ship. It wouldn't 'turn' it would 'veer' like a car drifts when you let go of the steering wheel but a bit more complicated than that.

Plus, with nothing to arrest the momentum, the craft would continue on its heading until some force changes it. So if you fire starboard jets, the ship's front would still be pointed in the same direction but the ship would move sideways at an angle until that sideways movement was cancelled by firing jets on the opposite side then firing rear jets to cause it to move forward again.

But its much more complicated than that. You could actually arrive at your destination upside down and sideways. In space, there is no way to affix your spacial orientation without external markers.

Then there is the counter thrust need to arrest reactive movement caused by deploying craft or shooting projectile weapons. You know, equal and opposite reaction and all that jazz. I'm sure there is a mass differential limit which would need to be known and figured into the design.

An astronaut can cause a very large object in space to move but an equal andopposite force relating to its mass would be needed to stop that movement. Plus, depending upon that mass, and the mass of the astronaut the movement might be insignificant in the first place.

The ISS is quite massive. It is also moving quite fast in its orbit. An astronaut is not going to be able to push it out of its path. The astronaut has too little mass. However, Jets of thrust can and does adjust its orbital path. This is because the jets are being expelled from the mass of the station. Those same jets hitting an astronaut would push him off into space at high velocity relative to his orbital position.

But see, all this relates to sound in space as well. Same basic conditions apply.
Space is empty. Nothing to transmit vibration, nothing to react to aerodynamic surfaces.
You put a tin can on Mars and a tin can in your living room and connect it with a taught wire andyou could talk to a martian as the vibrations would be transmitted along that wire to the can at your ear.

The same concept supports the space theather concept and it would work if we could get around the construction obstacles.

Interesting, the clip too! And suddenly remembered that I sometimes listen to soundfiles (I think binaural) with the frequency of Venus as that can help alleviate tinnitus.
I use that when it's real bad which doesn't happen too often thank goodness. But... it DOES work!

From all the planets' sounds I like Venus best! It's like chimes or sound bowls. Very nice to listen to :)
Saturn's sound kind of freaked me out, haha.

I will watch the other tomorrow. It's past midnight, bit too tired now.
I'll also re-read the last post. It's interesting for sure, but difficult to grasp for me. I'm quite the intelligent woman, but certain subjects just don't go in. Like my brain is saying "Nope. I'm taking a leave of absence now. Have fun on your own!"

I believe human egocentricies play a role
in what constitutes 'sound'.

"If a tree falls in the forest, and there's
nobody there to hear it, does it still
make a sound?"

The Real Truth.

No, sound doesn't travel in space, however, shock waves can be translated into sound.

Nasa recently released this creepy ensemble from a black hole. it was increased, if I recall, by 50+ octaves to make it audible.

https://youtu.be/sMdm5lXOssI

2001 space Odyssey is a great movie for this. They get it so right. The scene when the astronaut cones back into the ship after his fallout with HAL and it is done in perfect silence until he closes the door and pressurizes the chamber. Then we start to hear the noises.

Sound needs to vibrate the air molecules from one to the other in a series to get from point A to Point B. Although sound vibrates the air molecules around it at different pitches based on the energy wavelengths. Allowing for it to be heard louder in one direction over others. That is because the vibration (Ripples of waves ) are emitted stronger along that path.

As for the laws of Physics, I am one to believe they are not universal as most believe they are. Such as the Speed of light etc and how we calculate distances in space, redshift, etc.

The laws of Physics have been determined by measuring within our own galaxy and own solar system and mostly inside the atmosphere of the earth.

Science still has to update and catch up on many things they have yet to test.

As that vacuum has a density value that was not included in the formula when the speed was calculated. The vacuum of space at least has three variants S1, S2, and S3. Light in S3 can travel many times that of light Speed at our S1 and maybe S2 also. S1 is the density of space in the vacuum inside solar systems, S2 is the deny of space outside a solar system but inside a galaxy in other words the space between solar objects inside a galaxy but outside those solar objects such as systems, etc., and S3 is the density space outside galaxies and the vast empty spaces between them. We have evidence that light speed is not constant in the universe and is even many times faster than the LS science assumes to be constant. Hubble Years ago has tracked many thousands of light patterns traveling many times the LS calculation off far in the universe in S3. But even further to my belief is that the S1s and S2s have a wide scope of values based on the matter that exists within each. So in essence in some S1 & S2's in the universe, LS might be slower or even faster than what we calculate. This space density is the reaction between what we think of as Dark Matter and Dark Energy. It is this that manipulates the laws of Physics in the universe making it vary from location to location as moving through the universe and space.

With that outside our solar system light might be traveling at higher than our S1 light speed making our calculations wrong for the whole universe as well as distances and light color shifts. It could be that at soon as light hits the outer region of our solar system light is forced to slow down or speed up to the LS we know within our S1. Hubble sees light moving faster than light Speed calculation on earth but as it sees it appears as a smudge of light across the spectrum view from within our S1. What it might be seeing is the delay gap of it slowing when it hits our S1.

It would be nice to have a modern version of unmanned craft equipped to travel outside the solar system and test the light-speed variant. As well as run tests flashing light inside the solar system to be captured by earth sensors to run variant tests to see if there is an S1 distraction from outside S2 to the inside s1. Running a small number of relay sats that follow from enough distances behind to also capture the flashback light from the S2 to those inside s1 in order to calculate the light displacement and the space density interference which could also help expose what many think of as dark matter and dark energy as being just that density interference.


The problem is we might not have an accurate measurement of its distance to make such a measurement as we are basing distances on the light speed we know here in our s1.
We can Launch a more advanced Voyager 3 & 4 type mission with 3 leaving our solar system and 4 orbiting around the distance of Pluto inside our solar system. Each at a set in sync time with another that 3 would turn flashing lights with different color spec bands back toward the Voy4 sitting inside the solar system to capture the lights and use the in syn times to provide a set of numbers that would allow calculating such light speed and any difference thereof. On their journey out after launch many tests can be done in the solar system doing the same tests to get an s1 baseline set of numbers. And if the final tests for Voy 3 when outside the system send light inward to Viy4 inside the system, the numbers also consider the distance between both crafts. If the numbers come back different then we know light speed is not constant and is determined by the space density. We already have data now from the original Voyagers 1 & 2 that show space density outside our solar system is not the same as what is inside. That being said would change the vacuum-calculated properties in calculations also.

Should the results come back that Light is not constant then we also have a major problem the aging of the universe is wrong, the distance of objects in space would be wrong and the redshift of light laws would also be up in the air. Making our distance calculations for galaxies and other objects is not accurate anymore.

We do have tech that could allow us to get probes out that far in half the time now instead of 40 years using specially built thrust boost accelerators. Who knows maybe a new propulsion system I am looking to do some studies on and build a prototype may also be such an answer. The only problem is it only works in near to zero-G vacuumed. So it would have to be launched into orbit before it would work.

Those sounds are based on emotional representations and gravity waves. Recreated in a lab setting to provide output that we can hear and relate to between 20 to 20000 hertz. If we were actually right there they might be totally different but follow the wave pattern on different base sounds some we would likely not be able to hear in our hearing range and others yes if the air was around between us and it.

Just like the JWT pictures are also recreated from the feedback of the IR and other sensors. We set values for a wide range of colors and contrast for each sensor data value point that we receive. And the computer is able to recreate a representative visual picture that humans can relate to with the narrow view range of the human eye.

If a sensor data point received 0010001 00000011 in the conversion software it might be Red with contrast at 3%. Should that value show up again in a scan it will be the same for where ever it shows up in the image created. of next to it might be 0010001 00010110 which might be a brighter red at 22% contrast. and so on.

But in the end, we really do not know the true color we just use a constant representative as close as we can guess to values, and when the same value gets returned it indexes that color that we set out for the conversion. The Human senses are so limited to the full range of sounds and visuals thus we have no other way of allowing the average person to have any grasp on what the situation is otherwise.

I'm sure there are near vacuum and high density areas of space (gas clouds and nebulae).
Sound might travel in those areas of space. It might have distortions relating to the density and composition of that particular substrate.

In the intent of this thread and the context of 'movie physics' "vacuum" is true vacuum.
In true vacuum, there is no sound in space because there is nothing for the sound waves to move. Its the same physics for moving and 'flying' in space in the movies.

Spaceships don't 'fly' in space. There is nothing for their surfaces to 'glide' upon. Spaceships can't turn by banking their wings. Those wings and aerodynamic structures have no significance unless the craft actually enters an atmosphere. But...it 'looks cool' so the effects team uses it.

There are two realities here.
The false reality many people think from watching movies, poorly made documentaries or inadequate education assumptions.
Then there is the actual scientific reality which allows space agencies to send craft millions of miles into the solar system and actually end up where they wanted it to go.

Mankind's current level of understanding is relatively new. There is far more going on in reality than we can possibly understand right now.

Science, like science fiction, constantly expands its horizons as we understand more. Science 'rewrites' itself because it constantly learns new things and sometimes those new understandings change our basic understanding of something to the point old truths must be updated to new realities.

Movie physics has little to do with scientific reality and more to do with the "wow' factor needed to make money.


I've seen that film multiple times and I also see many things they got so WRONG.
There's a lot of movies and TV shows which gets SOME of the physics right but it seems there will always be some movie physics needed to please the audience and bring in the money.
I've also watched live NASA footage of space...which by comparison is boring as hell.
Movie physics is needed to keep the intended audience interested.

The way I see it, there are a few different levels of understanding:
1. Fantasy - movie physics, entertainment physics and folklore (warp speed, time travel, wormhole travel)
2. Speculation - understanding based in science realities but unproven by scientific method ("black Holes" {singularities}, absolute zero physics, artificial intelligence}
3. Theory - understanding based on scientific method with limited 'proofs'. {quantum physics, particle physics, interstellar space)
4. Science - understanding proven to be reality, tho limited to our current understanding of our own domain. (fundamental laws, relativity, particle physics)
5. Unknown - 99.99999>% of the actual universe which includes a very large percentage of things we don't even know to exist.

Sound physics is based on how we detect sound. Our ears and microphones detect sound as changes in density waves. If there is no substance to carry the sound wave, we can't detect sound.
Local space is not empty but it is sparsely populated. [approximately 5 particles per cubic centimeter around Earth and the density decreases further from the Sun]The density of air at sea level is about 1.2 kg/m3 (1.2 g/L, 0.0012 g/cm3). Atmospheric density decreases as the altitude increases.
So on top of Everest you would need to 'crank it up' to listen to your favorite song at the same level you like it on the ocean beach.