[JonathonW]

The stars featured in the movie and in this chart (and in the book) are real, and reflect their real-world locations.

The planets around the stars, aside from our own solar system (obviously), are fictional-- both Tau Ceti and 40 Eridani are stars where we're looking for exoplanets, but we don't have strong evidence for either yet.

[hgoel]

IIRC at the time the book was written, there was some data suggesting a planet detection around 40 Eridani, but has been ruled out since then.