... Sputnik went "beep, beep, beep", and the world changed.
It's Space Week from 4-10 October in celebration; there is probably a series of events on near you.
Normally, I only post on the planetary programme, but of course Sputnik was the public beginning of human effort in space, so it's only right to join in the party.
Happy birthday ...
UPDATE: There is an article in The Australian today on a push to establish an Australian space programme.