If you want to locate someone precisely on the surface of the Earth, you specify her exact latitude and longitude. If you want to locate a star precisely on the sky, you need to specify its exact:
A) meridian and great circle
B) constellation
C) north and east point
D) right ascension and declination
E) solstice and equinox

Question

Quizplus · Accepted Answer

To locate a star precisely on the sky, you need to specify its right ascension and declination. This is similar to latitude and longitude on Earth but for the celestial sphere. Right ascension is measured eastward along the celestial equator, while declination is measured north or south of the celestial equator.

If You Want to Locate Someone Precisely on the Surface