There was an arcade space game around 1982 or 83. You kept firing on a planet in the middle of the screen while other space ships tried to chase you away or destroy you. The planet kept repeating something louder and louder. After 100 or so shots, the planet finally blew up. Does ANYONE know what the hell the name of the game was???
Are you sure it was a planet you were shooting at or a space base which was being assembled by the enemy ships? Because your description sounds like Sinistar to me - http://en.wikipedia.org/wiki/Sinistar