The following entry has been inspired by a sun spot on the internet:
The good news is, the sun continues to shine here and our browned world is coming alive with tinges of spring greens.
Does sound exist in space? I've visited several websites to find a definitive answer to this question. Most echo the words and findings of
NASA and Cornell University. An interesting yet differing theory can be found at
Space.com.
The two top websites, the most prestigious ones, affirm that sound cannot exist in space. We can agree, based on current knowledge, that space is an area devoid of sufficient molecules to sustain an environment which perpetuates sound, but does provide a medium compatible for electro-magnetic particles & energy. If sound is registered in space, the atmosphere is "too thin" to permit any "sounds" to last long enough for our human ears to detect it.
The following from an article dated September 22, 2003 and entitled, "Sounds in Space; Silencing Misconceptions"; is music to my ears.
http://www.space.com/scienceastronomy/mystery_monday_030922.html"It's often said that in space, you can't hear yourself scream. True enough, more or less, but rather misleading. Recently, several SPACE.com readers wrote to ask how a B-flat emanating from a black hole could be detected from 250 million light-years away, as we reported earlier this month. The answer, along with related interesting facts, reveals that silence is in the ear of the beholder, and ears come in a variety of configurations.
Sound can travel through space, because space is not the total vacuum it's often made out to be. Atoms of gas give the universe a ubiquitous atmosphere of sorts, albeit a very thin one.
Sound, unlike light, travels by compressing a medium. On Earth, the atmosphere works well as a sound-carrying medium, as does water. The planet itself is very adept at transmitting an earthquake's seismic waves, a form of sound.
Space, though not as efficient, can also serve as a medium.
If a brave and clever astronaut could safely remove her helmet and shout into the cosmos, her voice would carry.
"We wouldn't be able to hear the sound because our ears aren't sensitive enough," explains Lynn Carter, a graduate student in astronomy at Cornell University. Not enough atoms -- if any -- would strike our eardrums. "Maybe if we had an amazingly large and sensitive microphone we could detect these sounds, but to our human ear it would be silent."
An amazingly sensitive microphone, in a sense, was used to discover the constant B-flat coming from the black hole [Story here]. NASA's Chandra X-ray Observatory observed gas, compressed by the sound, in concentric rings much like ripples on a pond.
Seeing sound
Andrew Fabian of the Institute of Astronomy in Cambridge, England, explained in an e-mail interview how the sound was generated and why its signature crossed the cosmos.
The black hole under study sits amid a cluster of galaxies, a region of space where gas is denser than the universe on average.
Playing the role of speaker membranes in the galaxy cluster are two huge cavities, filled with gas that is hotter than its surroundings. This heat is generated by energy shot out from the black hole's environment as it accelerates matter to nearly the speed of light, just prior to swallowing it.
"The repetition needed to make the sound into a note is due to the cavities being buoyant -- the ultrahot gas is thinner than the cluster gas," Fabian said. "So the process resembles what happens when a child blows through a straw into a glass of milk."
Every 10 million years, a fresh wave bubbles out of the system.
"Sound waves are waves or ripples of pressure traveling through a gas," Fabian said. "Displace some nearby particles by pushing -- say the membrane of a loudspeaker -- so there's a pressure peak, and those particles will push on particles further out and so on. The result is that the pressure peak moves outward, although no individual particle actually goes very far from its original position."
Ocean waves work similarly. A swell can travel thousands of miles, but it moves through the water rather than packing the molecules along.
As the pressure peaks travel outward from the cavities around the black hole, collisions occur between atoms in the gas, generating X-rays that reveal a concentric ring pattern. Being a form of light, X-rays can traverse the universe sans any medium, and these are what Chandra detected.
The sound waves rapidly die out, their energy converted to heat. So in essence the B-flat was seen, not heard, from 250 million light-years away."
It would be pretentious to suppose that at present, our known theories along with my own observations, can adequately question current, accepted theories. The above article from Space.com stretches the truth somewhat for those of us who adhere to accepted definitions of "sound". However, if we for a moment consider that sound vibrations can be transmitted without benefit of a compatible receiver (i.e. our human ears), then there is perhaps an element of truth in the statement that sound in space has been detected by the likes of NASA's X-Ray explorer, Chandra.
At NASA's website http://www.nasa.gov/mission_pages/chandra/main/index.html
we can learned about the recent discoveries of Chandra. While there appear no claims to Chandra's ability to detect "sound" as we have come to know it, the article suggests existence of much activity in black holes. If Space.com is reasonably accurate, then it is in this place of Black Holes that massive energy patterns of gas emissions exist, providing an unusual medium for "space sound".
Does the sun "sing"? I've thought on this and wonder. A friend's cat is deaf, yet he comfortably sits next to my wrist feeling my pulse. If I hold him, he is lulled by the vibrations of my heart beat or reacts affectionately to vibrations from my voice as it resonates through my body to my finger tips as I stroke him. But I know he is deaf and am surprised to find myself speaking to him and surprised again by my own imaginings that he can "hear" me.
Further probings through the internet universe yielded more information at Stanford University's Solar site;
http://solar-center.stanford.edu/singing/singing.html
In their introduction to this segment, these words introduce the theory of sound emitting from the sun:
"The Sun is playing a secret melody, hidden inside itself, that produces a widespread throbbing motion of its surface. The sounds are coursing through the Sun's interior, causing the entire globe, or parts of it, to move in and out, slowly and rhythmically like the regular rise and fall of tides in a bay or of a beating heart." (Kenneth R. Lang)
Perhaps you'll be interested to read these articles too, and listen to sounds from deep within the sun, sped up thousands of times and gathered for more than a month so that we can hear the sounds of the sun in 1.5 minutes.
While they are not mainstream theories, they serve to open our eyes and our ears to many great possibilities of the existence of harmonious resonance throughout the universe.