Can you solve this WORD QUIZ?

Can you solve this WORD QUIZ?

Here's an interesting and fun word quiz, courtesy of US National Public Radio.

Name a branch of scientific study. Now, drop the last letter and rearrange what's left to name two subjects of that study. What branch of science is it?

Hint: the two subjects are each 4 letters long, all remaining letters are used, and no letter is used twice.

Answer will be given tomorrow (Sunday).

Updates
+1 y
Correct answer is... ASTRONOMY

If you drop the "Y" and rearrange the letters, you get STAR and MOON
Can you solve this WORD QUIZ?
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