can u explain why supernova explosions in space can b seen but not heard on earth.?

Question

can u plzz explain why?

Answer 1

'In space no one can hear you scream'

Remember that? It's because there is no sound in space - you hear sound because pressure waves form in the air around you what you are hearing is literally a variation in air pressure, that's all. Sound can travel through other mediums even better - underwater, sound is 4.3 times faster and travels at about 1500 metres per second.

No air, no pressure, no sound.

Answer 2

Actually, you could hear a supernova in space exploding if it was sufficiently powerful or close. But not because the "sound" of the explosion would travel from the exploding star to your ear.

An exploding star radiates energy in the form of electromagnetic waves, gravity waves, high velocity particles. Close to the star there is actually enough matter and in the correct phase to conduct some sort of sound but that would soon be gone in a nova explosion.

If the energy of this explosion was still great enough after traveling the vast distance through space, it would impart some of its energy into earths atmosphere in the from of sound waves. You would be able to hear the energy of the exploding star in the from of sound.

However, should a nova of enough magnitude to induce sound waves in the earth's atmosphere, the energy would likely be enough to cause devastation on the earth.

Gamma ray burst is the most likely event of this type. These events are one in a billion years in any given galaxy and probably more rare in our own neck of the woods.

For most star explosions no audible energy at all will be communicated to the earth.

Just had the strong inclination to upset the apple cart on this one.

Jerry

Answer 3

Air is used to transfer sound waves. That is how we are able to speak to one another. That is why astronauts communicate with radios because there is no air to transfer sound. So a supernova explosion could not be heard because there is no air in space for sound waves to transfer; plus if sound waves could moves through space, it would take way to long The speed of sound moves on average at around 750 miles/hour. The distance of stars can be hundreds or thousands of light years away.

Answer 4

Because space is a vacuum and sound can not travel in a vacuum. Plus the fact that the supernova explosions are hundreds of light years away.

Answer 5

Apart from the fact that sound cannot travel in the vacuum of space, you obviously have no idea how slowly sound travels compared to light. At sea level on Earth, light is just about a million times faster than sound. Even if there was air at our density between here and the distant stars, it would take sound billions of years longer to get here than the light.

You need a reality check on the scale of space.

Answer 6

Any sound requires some thing to transmit the sound. Air is a pretty good transmitter of sound, water works too, along with lots of other stuff. However, in space where supernova (..plural is 'supernovae'..) happen there's no thing to transmit the sound from place to place. We can still see the light from these supernovae because light doesn't need any thing to transmit it from place to place.

Answer 7

Space=vacuum
vacuum=no air
no air=no sound

Answer 8

sound needs something to travel through for it to be heard (water, air, something), in space there just isnt a medium to travel though. space is (basically) a vacuum, theres about 1 atom per cubic meter. so theres nothing for sound to travel through.

Answer 9

And they don't happen that often in our own galaxy. Thae last one we know of was observed in the early 1600s. The others since then have been observed in other galaxies.

Answer 10

I think its because sound needs a medium to move through to be heard, and in space, there's....nothing.

don't quote me on that cause it may be wrong :)