Full Idea
Not all sciences are experimental - astronomers obviously cannot do experiments on the heavens, but have to content themselves with careful observation instead.
Gist of Idea
Not all sciences are experimental; astronomy relies on careful observation
Source
Samir Okasha (Philosophy of Science: Very Short Intro (2nd ed) [2016], 1)
Book Reference
Okasha,Samir: 'Philosophy of Science: very short intro (2nd ed)' [OUP 2016], p.2
A Reaction
Biology too. Psychology tries hard to be experimental, but I doubt whether the main theories emerge from experiments.