In 1655, Chistaan Hygens pointed one of his new telescopes towards Saturn with the intention of studying its rings, but he was very surpised to see that beside the planet was a large moon now known as Titan.
christaan huygens discovered saturnes moon with a telesope with his own lense that he made.
now we know that christaan huygen discovered saturns moon and that it is known as titan.
voyager 1 & 2
on september 12 2013, voyager 1 found a change in interstella space where ashes from long vanished stars float every three or so centimetres.
people on earth found this out by voyager 1 sending infomation and pitcures back down earth.