Yesterday October 4th marked the 50th year of beginning of space age!
"Beep… beep… beep...." That's the sound that marked the beginning of the Space Age fifty years ago. It was a simple radio tone transmitted by the first satellite, Sputnik 1, as it orbited Earth in October 1957.
Do you want to hear the sound? Click here to hear with your own ear!!
Other interesting first satellites signals available here