Earlier quoted context omitted.
They can't. In order: Eve is a murder/capitalism simulator and has almost no physics in the first place. (There's 3-dimensional positioning, but you can fly through planets and shoot through other ships as much as you like; also the entire world is static.) No Man's Sky is 90% an art piece with some added murder simulation. Elite: Dangerous, also a murder/capitalism simulator, only unlike Eve it's more about the imme…
You're assuming the goal is to teach astrophysics, rather than astronomy. If we're just trying to teach the space equivalent of geography, the physics and plot don't matter so much as the physical locations and nomenclature.
https://simple.wikipedia.org/wiki/Astronomy
Additionally Sagan was most certainly conflating it with astrophysics, as is commonly done, and evidenced by his mention of "stellar evolutionary events".