If you ever notice that after some time, our Yahoo search bar logo will turn to look like this;
Love Our Earth! Do Recycle!
Cute one isn’t? And suddenly I remember one of my sister’s msgs, she told me (she probably just watching Discovery Ch) earth have a mysterious sound, that completely imperceptible to the human ear. The sound is something like “ hummm..” erk…eww..haha..ya, at first, I thought it was disgusting but the curiosity still drive me to google the fact. This is what I found..
Competing with the natural emissions from stars and other celestial objects, our Earth sings like a canary -- it drones on in a constant hum of a gazillion notes. If it were several octaves higher, and hence, audible to the human ear, it could probably drown out the noise from a hundred TV talk shows.
In recent years scientists have used seismographs to sort out these subsurface sound waves from earthquakes (all seismic waves are, essentially, the in-ground equivalent of sound waves). But what causes the hum, which researchers call the background-free oscillation, has been a mystery.
A space symphony?
Because Mars and Venus are both solid bodies with atmospheres, our two nearest planetary neighbors are probably humming too, creating a miniature symphony in space.Because the density of these atmospheres is different, amplitudes of the 'sound' might be different,The sounds are below 10 millihertz, whereas 10,000 millihertz is about the lowest audible to the human ear. Which means you can't hear the hum. Good thing, because the discordant sound has been described by one geophysicist as "a very messy noise." <-- cute nye!
(for more visit http://www.space.com/)
By reading many version fact of the Earth hum, I am starting to imagine, if Earth is a human, how does she look like? Sedangkan zaman Rasulullah (SAW) bumi di ibaratkan wanita tua..jadi sekarang ni, cane la ye..No doubt, she has gracious heart..Memberi tanpa meminta..isn’t she?
Love our Earth!