50 year exploring the Space

Humankind has reached 50 years of Space Exploration. I haven't been born when all this amazing adveture began, but luckily I've seen many of it's achievments. I wish I'll be still alive when the firts man leave his footprints on Mars. through my 31 years on Earth I've been spectator of the Challenger disaster, the born of the Hubble telescope, the Voyager pass trhough Jupiter and Saturn and the magic story of Oportunity and Spirit in Marts(A three martian months mission that is still alive after 3 earth YEARS), between many other great challenges reached.