Inspired by this question, is there a canon explanation for the Space Shuttle Enterprise's name?
Of course in real history, it was named for the USS Enterprise NCC-1701 seen in TOS.
However, since the Enterprise credits show the space shuttle, is there a different reason for the shuttle's name, or does TOS as a show actually exist in the Star Trek timeline?
Although the suggested duplicate question is similar, it only answers why the starships were named Enterprise, not the NASA Space Shuttle. Some comments do mention the real-life letter-writing campaign, but it doesn't specify if that event occurred within the Star Trek universe timeline.
Since I doubt there's an on-screen answer, I'll accept novels, comics, and any other EU material.