The most common and most likely answer to this crossword clue is the 9 letter word ASTRONOMY
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More clues leading to the result ASTRONOMY
- A solid, almost gracious branch of science
- Scientific study: like essay about new moon
- A second attempt to describe unusual moon in science
- Branch of science applied to masonry
- Space explorer’s study?
- It involves moon, star and far side of galaxy
- Discovering what’s up is exciting to a Mr Nosy
- Drunk star’s performing sacred syllable unknown in science
- A small attempt to describe whirling moon in space science
Buddy explains!

The straight part
We know that "space science" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case space science = astronomy.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ASTRONOMY mean?
ASTRONOMY noun- The study of the physical universe beyond the Earth's atmosphere, including the process of mapping locations and properties of the matter and radiation in the universe.
- Astrology.