Next Last Index Home Text Slide 41 of 44 Summary 1.
Astronomy is the science in which the entire universe is studied.
The study of astronomy, requires knowledge of several sciences, including physics, chemistry, geology, and biology. The essence of science is to find the best explanation of observed phenomena. A theory is an explanation that may fit, but is always subject to revision if observations reveal it to be incorrect, an essential element of any theory is its ability to make predictions that can be tested.