Which of the following is not one of the three main categories of observation generally used by astronomers?
A)filtering to look at just a single color from an object
B)timing to track how an object's brightness varies with time
C)spectroscopy to spread an object's light into a spectrum
D)imaging to get a picture of an astronomical objects

Question

Quizplus · Accepted Answer

The three main categories of observation generally used by astronomers are timing, spectroscopy, and imaging. Filtering to look at just a single color from an object is not considered a separate category, but rather a technique used within the spectroscopy category.

Which of the Following Is Not One of the Three