by Hayley Sloan
In 1655, Christaan Huygens pointed one of his telescopes towards Saturn with the intention of studing its rings, but besides the planet he saw that it also had a large moon, now known as titan.
Now we know that Saturns moon is refered to as titan.
Christan Hugyens used a telesope with his own lenese that he made to discover Saturns moon.
Post 1900 - vogayer 1 & 2
On September 12 2013, Voyager 1 found a change in intersteller space, where ashes from long vanished stars float every three or so centimetres.
Everything voyager 1 & 2 find or see, they send back down to earth so everybody involed with the spacecrafts are aware of everything thats going on.