since gravity in nonexistant, other than on earth..?

Question

then there is no sound right? so when a star explodes, or the black hole feeds, still no sound. i can't fatham that.

Answer 1

1. Gravity has nothing to do with sound.
2. Gravity exists outside of Earth; it exists everywhere -- it's just stronger as you get closer to a massive body such as the earth or the sun.

I think what you're trying to fathom is the fact that there is "no sound in space," which is true because sound requires an atmosphere -- sound is really just tiny changes in air pressure that we detect using our eardrums. There is no air in space, hence no sound.

Answer 2

Okay, first things first. Gravity does exist on places other than Earth. It exists everywhere. For example, it holds the Moon in orbit around the Earth. It holds the Earth and all the other planets in orbit around the Sun. It holds the Sun and all the other stars in orbit around the galaxy...really, it is everywhere.

Sound has nothing to do with gravity. Sound travels when it has a medium to travel through. For example, we hear things on Earth because we have an atmosphere to carry the sound. Even if we didn't have one, sound would still travel through rock, water, whatever. Sound doesn't travel through a vacuum because it's just empty space; there's no medium to transmit it.

When a star explodes, you won't hear it if you're well outside of the blast area. If you're inside the expanding shell of gases....well, you'll be cooked. But if you can survive that, you'll hear it loud and clear because the gas will transmit the sound. I have no idea what it would sound like, though. Probably very, very, very loud.

So, bottom line: if you're in some sort of medium you can hear sounds. If you're not, you can't. I hope that helps!

Answer 3

You're all over the board here. Gravity doesn't have anything to do with sound.

1. Gravity exists all over the universe, not just on earth. Gravity is why planets orbit stars, and starts orbit galactic centers, etc.

2. There is no sound in space because sound is the vibration of particles bumping into each other because of a force moving through air or water or a solid mass. If a star explodes, there is no sound because space is basically empty and there's nothing vibrating. However, where there are gases in space, there would be sounds... just nobody's eardrums are there to hear it.

Answer 4

No. Gravity is everywhere, and I repeat: everywhere. Even in the deepest parts of space, between galaxies, there is gravity. Gravity is the attraction between any to objects with mass (well...light too, but that is more complicated). Anyway, the reason people in space are weightless is because they are actually in free-fall (think about if you were skydiving). In free fall you have no weight because nothing is exerting a force back on you (like a floor).

Also, people in deep space are able to 'float' (kinda a bad term...but ok) is because there the gravitational forces would all be equal, so you would have no net acceleration in any direction.

Ok, now about sound. Sound is not dependent on gravity, not at all. Sound is dependent, though, on a medium to travel through. So on earth, this medium is air. If you're in a swimming pool and you speak sound will actually travel much faster because it is in a thicker medium (water is more dense than air). So, yes, when a star explodes no one (that could live to hear it) could hear it because there is no matter in space (well, only a very little bit) that allows sound to travel.

So in the end, you are right that supernovas don't make audible noise, but it is because sound can't travel thru the vacuum of space and not because there is no gravity.

I hope this helps!

Answer 5

First off, I need to point out that there is gravity in every solid object, and that it is not non-existent. A pencil has gravity, and in space, a small piece of paper may orbit it. Mars and the Sun have gravity too (In fact that's why we experience different seasons, because the sun moves the earth). Every object has the force of gravity pulling on each other, it's just that earth has the strongest gravity, keeping everything around it in place, just like the sun keeps all the planets in place.

Secondly, a black hole is a well of such powerful gravity that it captures everything into the size of an atom, including light and sound (therefore black holes are silent.)

Thirdly, sound is like light, and light travels in space, so therefore sound does too. We just can't hear it because the frequency is too low or high for the human to detect.

Answer 6

Gravity acts at every distance according to Newton's model of gravity. Note that Einstien refined this model with is theory of General Relativity.

But without introducing Einstien's theory, Newton's model still makes sense, since the predicted forces from the nearest celestial body are negligible compared to the force from Earth.

I'm not sure why you make the assertion that if there is no gravity there is no sound. Sound waves are pressure waves so they travel through a medium (a gas, a solid, a liquid, or any combination.) To the extent of my knowledge, gravity does not directly influence sound.

However, you may be right in saying there may be no sound in space. If there is no sound than it is most likely caused by the fact that space is mostly a vacuum, meaning there is no medium from the sound waves to travel through.

Answer 7

Sound needs a medium (e.g. air) to propagate.

Gravity is due to mass (we think!) and is another matter.

Sound is defined to fit our earing system. And what makes our ears work are the changes made in the air by the sound waves (energy).
If there are no medium, nothing reaches our ears and we ear nothing.
If there are no light, nothing reaches our eyes and we see nothing.

We can think of sound potential: if there's a medium what would be the sound? And get an answer like 10^5(?) dB. Uau!

Answer 8

Actually... there *is* sound at places other than Earth. An exploding star & feeding black hole are both 'silent' - because there's no atmosphere or other medium to conduct the soundwaves... however, inside the atmosphere of the sun, or Jupiter, or Saturn, the sound is enormous.

Answer 9

1. Gravity is everywhere. It is felt whenever matter (galaxies, stars and planets) distorts it.

2. Space is a vacuum. Sound cannot travel in a vacuum.

Answer 10

WHOEVER TOLD YOU THAT GRAVITY WAS NON-EXISTENT EXCEPT ON EARTH GAVE YOU A BUM STEER. GRAVITY IS A UNIVERSAL THING. AS TO THE SOUNDS, HUMANS ARE CONSTRUCTED TO REQUIRE A MEDIUM FOR SOUND TO TRAVEL THROUGH TO BE HEARD . A MEDIUM SUCH AS AIR OR WATER. AS TO AN EXPLODING STAR, IF YOU WERE CLOSE ENOUGH I EXPECT YOU COULD HEAR IT GO BOOM WITHOUT A MEDIUM BUT THAT MIGHT BE THE LAST THING YOU EVER HEARD.