Nerys Myk wrote:
UESPA and "Earth ship" pretty much disappear in the first season ...
The Enteprise was still being referred to as being from Earth in the last episode of the second TOS season (Assignment: Earth).
... but Earth ship wasn't heard of again till Enterprise which was explicitly about an Earth ship.
Encounter At Farpoint
Q: "Thou art directed to return to thine own solar system immediately ... Go back whence thou camest."
Picard: "Our only other option is to tuck tail between our legs and return to Earth as they demand."
Q never mentions Earth, but Picard does, the Enteprise D is from Earth.