Thousands of Astronomical Units.
The plan was to send a telescope 1000's of AU out of the plane of the galaxy.
This would provide for direct imaging of our own galaxy (and hidden hangers on) while also providing a long baseline for accurate distance measurements.
It doesn't need to come home any more than Hubble did.
The images would be no less spectacular and awe inspiring than Hubble.
It would exceed the current lifespan of our civilization to get it into position, iow, it wouldn’t be functioning, and if it were, would be long forgotten.