Question

An astronomer see a star that is very far away but still very bright. What can she conclude about the star?

The star must be very large.
The star must be very small.
The star must be moving away from Earth.
The star must be moving closer to Earth.

Answer 1

One can conclude that the star is very bright. It usually also means large, but that is not always true on bright stars. However, of the choices, A is probably the best choice, but I suspect many astrophysicists would want to bite their tongue on such a simple answer, without noting the type of star also.