A Branch of Science

Write down a branch of science that can be studied. Remove the last letter and anagram the remaining letters. You will have now formed two subjects that are studied as part of the original branch of science. What is the branch of science and what two subjects are studied within it?

Scroll down for a clue and further down for the answer.

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Clue: Look up.

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Answer: ASTRONOMY and MOON, STAR.

* This article was originally published here