The USS Niels Bohr was a 24th century Federation starship operated by Starfleet.

Bruno Salvatore was assigned to this ship on stardate 47332.9. The ship was named in Salvatore's personnel file. (TNG: "Eye of the Beholder", okudagram)

This starship was only mentioned in writing.
It was presumably named for Danish physicist Niels Bohr.
This starship was listed with other real starships in the ship list from the Star Trek Encyclopedia (4th ed., vol. 2, p. 332).