A star is in an elliptical orbit around a black hole (which can't be seen). You have been observing the motion of the star through a telescope and have followed the motion long enough to establish that it is elliptical. How can you determine on which focus of the ellipse the black hole is located?

Question

Quizplus · Accepted Answer

The Answer of A star is in an elliptical orbit around a black hole (which can't be seen). You have been observing the motion of the star through a telescope and have followed the motion long enough to establish that it is elliptical. How can you determine on which focus of the ellipse the black hole is located?

A Star Is in an Elliptical Orbit Around a Black