Lunar expert? Moore, television's ultimate star, possibly (10)

I believe the answer is:

astronomer

I'm a little stuck... Click here to teach me more about this clue!

'lunar expert?' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'moore television's ultimate star possibly' is the wordplay.
'ultimate' says to take the final letters (the last or ultimate letter).
'possibly' indicates an anagram.
The last letter of 'television' is 'n'.
'moore'+'n'+'star'='moorenstar'
'moorenstar' is an anagram of 'ASTRONOMER'.

Can you help me to learn more?

(Other definitions for astronomer that I've seen before include "Sky-at-night observer" , "Dorado may be contemplated by me" , "One studying the universe" , "Moon-starer (anag)" , "Moon starer (anag.)" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.