Sound is a mecanical wave, which means that it needs substance to travel through, such as air or water. In space, there is no air, so sound has nothing to travel through. If someone were to scream in space, the sound wouldn't even leave their mouths.
Sound waves travel through vibrations, which means that the atoms or molecules need to touch each other to move the vibrations on. However, space is mostly a vacuum. Although there are some atoms floating around, they are VERY far apart, which means that there is no sound on the Moon.
In a space ship, you could of course hear the other passengers because your ship is filled with air. Additionally, a living human will always be able to hear himself talk, breath, and circulate blood, because the air in his space suit which sustains his life also transmits sound.
On Earth, sound travels to your ears by vibrating air molecules. In deep space, the large empty areas between stars and planets, there are no molecules to vibrate. There is no sound there.
Other astronauts have described it in similar yet varying ways: "burning metal," "a distinct odor of ozone, an acrid smell," "walnuts and brake pads," "gunpowder" and even "burnt almond cookie." Much like all wine connoisseurs smell something a bit different in the bottle, astronaut reports differ slightly in their " ...
Try 3 issues of BBC Science Focus Magazine for £5! We can't smell space directly, because our noses don't work in a vacuum. But astronauts aboard the ISS have reported that they notice a metallic aroma – like the smell of welding fumes – on the surface of their spacesuits once the airlock has re-pressurised.
No, there isn't sound in space.
This is because sound travels through the vibration of particles, and space is a vacuum. On Earth, sound mainly travels to your ears by way of vibrating air molecules, but in near-empty regions of space there are no (or very, very few) particles to vibrate – so no sound.
Sound waves need a medium to travel. As there is no atmosphere or medium on the moon, that's why no sound can be heard on the moon. Astronauts use radio waves while talking to one another on the surface of the moon.
In space, there is no air, so sound has nothing to travel through. If someone were to scream in space, the sound wouldn't even leave their mouths.
The loudest sound in the universe definitely comes from black hole mergers. In this case the “sound” comes out in gravitational waves and not ordinary sound waves.
To travel to us from outer space, the wave must be able to travel through regions of space which are essentially vacuum (nothing there). Sound cannot do this, as it requires a medium to propagate in, so we would not be able to hear the explosion.
They use radio waves and sometimes other forms of electromagnetic radiation to get their words to Earth. Similar to a mobile phone, the astronaut talks into a device which converts sound into not-sound (electromagnetic waves).
Einstein's theory of spacetime tells us that the real universe is not silent, but is actually alive with vibrating energy. Space and time carry a cacophony of vibrations with textures and timbres as rich and varied as the din of sounds in a tropical rain forest or the finale of a Wagner opera.
This phenomenon was alluded to by the marketers of the 1979 sci-fi horror Alien, who coined the famous tagline, “in space no-one can hear you scream.”
Well, it would simply drift into the blackness, forever alone, while the galaxies around it sped further away. Those galaxies are travelling at around 200km/s (124 miles/sec) as the Universe expands, whereas a travelling bullet can reach speeds of only 1km/s (0.62 mile/sec).
Assuming you are floating freely in space the gun will work just as it does on Earth. However, the bullet will continue moving for many thousands of years, eventually coming to a stop due to the friction from the diffuse material found in 'empty' space (or when it encounters another object).
Water boils when there is no pressure. This means that in the vacuum of space, a cup of water would boil into a vapor before it can freeze. It would eventually freeze, but it would – desublimate – or vaporize into a gas first, then turn directly into a solid.
The short answer is we don't know. We know the observable universe — the part we can visibly see and measure — began around 13.8 billion years ago with the Big Bang. So we know the age of the universe is finite at least from the time of the Big Bang. But the universe is getting bigger.
Previous research has shown that spending time in space causes bone density loss, immune dysfunction, cardiovascular issues such as stiffening of arteries, and loss of skeletal muscle mass and strength in both humans and rodent models. These changes resemble aging in people age on Earth, but happen more quickly.
Today, we can hear the Sun's movement — all of its waves, loops and eruptions — with our own ears. This sound helps scientists study what can't be observed with the naked eye.
Practically, we cannot even imagine thinking of the end of space. It is a void where the multiverses lie. Our universe alone is expanding in every direction and covering billions of kilometres within seconds. There is infinite space where such universes roam and there is actually no end.
Researchers suggest the smell of Mars might include the sharp, biting, rotten egg scent of sulfur with some whiffs of a chalky, sweet smell. None of this sounds pleasant, but it would not make Mars the worst-smelling planet.
Far outside our solar system and out past the distant reaches of our galaxy—in the vast nothingness of space—the distance between gas and dust particles grows, limiting their ability to transfer heat. Temperatures in these vacuous regions can plummet to about -455 degrees Fahrenheit (2.7 kelvin). Are you shivering yet?