Well according to Wookieepedia:
During the last days of the Old Republic they funded an extragalactic expedition project, but whether or not this expedition was ever successful or even went past the planning stage is unknown.
Its obvious that these 'Children of the Green Planet' sent an explorer (E.T) to explore other galaxies and discovered Earth. Then he returned home and his discovery was probably silenced by the Galactic Empire.
Spielberg should make another film where Earth is invaded by the Galactic Empire led by Darth Vader
And yes, if we consider E.T to be star wars canon - he kinda has to be force sensitive.