Sounds does exist in space, through Electromagnetic Vibration
From an original CD: JUPITER NASA-VOYAGER SPACE SOUNDS (1990) BRAIN/MIND Research Fascinating recording of Jupiter sounds (electromagnetic "voices") by NASA-Voyager. The complex interactions of charged electromagnetic particles from the solar wind , planetary magnetosphere etc. create vibration "soundscapes". It sounds very interesting, even scary. Jupiter is mostly composed of hydrogen and helium.
Therefore, since helium and hydrogen atoms / gas make up the largest volume of the Universe, a planet similar to Earth, would resonant differently behind the background of helium and hydrogen atoms that are farther away from the Sun that the habitable planet is orbiting.
It's similar to looking for a transiting planet, a small single pixel of static, in the background of a t.v. screen full of static.
A planet causes a dip in the light curve as it transits across a Sun. Based on EM Vibration, the same planet should also produce a noticeable rise in the amount of EM vibration (highly excited helium and hydrogen) during the same transit across the planet's parent star.
Each planet would have its own helium/hydrogen EM vibration pattern that is hidden in a single pixel of light that would need to have the color regions of the single pixel sharpened to around 10,000%, to determine the actual amount of hydrogen and helium vibration taking place.
Just because a pixel is red or yellow, doesn't mean the entire pixel is red or yellow. There are in fact, percentage values to each color in a pixel that can paint a very accurate picture of what is being viewed.
