Which of the following properties of a star can be measured directly, during a single night at the telescope?
A)parallax
B)apparent brightness
C)luminosity
D)distance

Question

Quizplus · Accepted Answer

Apparent brightness can be measured directly during a single night at the telescope by using a photometer or CCD camera. Parallax and distance require observations over longer periods of time, and luminosity requires knowledge of both distance and apparent brightness.

Which of the Following Properties of a Star Can Be