Science - The Sounds of Space

 

 

 

  

 

Sounds Of Planets -

Weirdest sounds ever heard,

 

 

 

The Sounds of Space – Vibration

Planets Sounds ( 7 mins)


http://www.youtube.com/watch?v=ToXaNUjNfS4&feature=related


 

 

 

 

 

 

 

Sound of Sun  ( Like a Heart-Beat?) (  2 mins) 

http://www.youtube.com/watch?v=pGwDdTZBAEY&feature=fvwrel

 

Scientists Decode the Song of the Sun (  mins)
http://www.youtube.com/watch?v=52pnoLa3BP4


 

 

 

 

 

 

 

NASA: Sound of a Black Hole  (  1 mins)

 

Watch a NASA animation zooming in on a black hole as you listen to black hole sounds. The sounds are X-ray data from GRS 1915+105, translated into audible pulsations by MITs Edward Morgan.

 

This black hole is a near-extremal Kerr black hole. See how to microscopically calculate the entropy of this black hole using string theory methods:

 

http://www.youtube.com/watch?v=jYiWNLv-Bgg&feature=related

 

 

 

 

 

 

The Sound Of A Dying Star Isn't What You'd Expect (SIMUL. AUDIO)

 

When scientists watched a black hole devour a dying star last year, they were blessed with a plethora of data to study. But there was one question particularly on the minds of some astronomers: What did it sound like?

Well, truth be told, it didn't sound like anything because there's no sound in space (or at least not any at a wavelength audible by the human ear).

But based on the data collected by NASA's SWIFT satellite and other instruments, scientists have figured out what a person might hear were they actually able to hear an event like this. "You can think of it as hearing the star scream as it gets devoured, if you like," Jon Miller, a University of Michigan astronomer, said in a statement according to Space.com.

The answer is surprisingly simple: It sounds like a D-sharp played with a synthesizer about 16 octaves lower than the middle of a keyboard. However, according to CNN (which has provided the audio below), the sound is at a frequency well below what the human ear can perceive.

 

Miller's estimate is the result of light data captured after the dying star was being consumed, the Atlantic reports. Essentially, Miller and his team took the flashes of light that were emitted as the star was torn apart and interpreted them into sound waves.

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http://www.huffingtonpost.com/2012/08/21/the-sound-of-a-dying-star_n_1812314.html

 

 

 

 

 

Distant Star Makes Music – Text by BBC

Astronomers have detected sound waves in the outer atmosphere of a star 130 light-years from Earth. Synthesized, they come across as a lot of bass notes, say the researchers. The detection technique the scientists used allows them to probe the outer layers of stars, to compare observational data with theoretical models to show how the stars should behave and develop. The technique is the same one that has been used in the past decade to find more than 70 planets circling other stars.

Boom, boom

Three decades ago astronomers realized that the Sun vibrates like a giant musical instrument with well-defined notes or frequencies.

xi Hya oscillates with several periods of around three hours. The energy that excites these sound waves comes from the turbulent convective region just below the Sun's visible surface. It was the observation of these solar sound waves - it is called Helioseismology - that resulted in our vastly improved understanding of the Sun's interior.

It is possible to apply these techniques to other solar-type stars. Observations have shown that Alpha Centauri A - the nearest bright star to our Solar System - behaves very much like the Sun, and that some of the periods it displays are also quite similar to those in our star. Now these vibrations have been picked up in other types of stars.

Big and Red

An international group of astronomers has found that the giant star xi Hya behaves like a giant sub-ultra-bass instrument. This star is located in the constellation Hydra. It has a radius about 10 times that of the Sun and its luminosity is about 60 times larger.

The astronomers observed xi Hya with the Swiss Euler telescope at the La Silla Observatory in Chile. They used the Coralie spectrograph, which is well known for numerous discoveries of exoplanets.

The new observations demonstrate that xi Hya oscillates with several periods of around three hours, and have speeds of up to two metres per second. This is somewhat smaller than expected, but the predictions are very uncertain as the conditions in xi Hya are so very different from those in the Sun.

xi Hya is considerably more massive than any other star in which solar-like oscillations have so far been detected. It is approaching the end of its life. It is about to expand its outer envelope to become a red giant star.

http://news.bbc.co.uk/2/hi/science/nature/1994038.stm

 

 

 

 

 

'Music of the stars' now Louder – BBC

The Kepler space telescope measures the sizes and ages of stars five times better than any other means - when it "listens" to the sounds they make.

…. Like a musical instrument, the lower the pitch, the bigger the star. That means that the sounds are thousands of times lower than we can hear. But there are also overtones - multiples of those low frequencies - just like instruments, and these give an indication of the depth at which the sound waves originate, and the amount of hydrogen or helium they are passing through….

http://www.bbc.co.uk/news/science-environment-12507032
 

 

 

 

 

First Stellar 'Heartbeat' Heard - BBC

For the first time, sound waves have been detected racing through the outer layers of a star other than our own.


The effect, easily seen in the Sun, was picked-up in Alpha Centauri A, the nearest bright star to our Solar System.  - In a series of remarkably precise measurements, astronomers from the European Southern Observatory (Eso) dissected the star's light to see the effect.

Oscillations induced by sound waves travelling through our Sun's atmosphere have been detected since the 1960s. Just as their Earthly counterparts, seismic waves, reveal what it is like inside the Earth, solar sound waves have become an important probe of the Sun's interior
 

 

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Alpha Centauri A


The sound waves, caused by turbulent motions in the Sun's outer layers, cause the Sun to oscillate at certain frequencies. The most-studied solar "heartbeat" is five minutes in duration.

http://news.bbc.co.uk/2/hi/science/nature/1418291.stm


 

 

 

 

 

 

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