The most common and most likely answer to this crossword clue is the 7 letter word PTOLEMY which also is the latest solution we found used in Slate in 2002.
He discovered evection, the irregularity in the moon's orbit crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| PTOLEMY | 100 % | 7 | 
Words with a meaning similar to the clue: He discovered evection, the irregularity in the moon's orbit
These words may or may not be a possible solution to this crosswords clue.- herschel
 - planet
 - galileo
 - hipparchus
 - processed
 - processing
 - janus
 - moon
 - apollo
 - region
 - collins
 - langley
 
Crossword Answer definitions
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution
More clues leading to the result PTOLEMY
- Cataloger of the "original 48" constellations
 - Ancient astronomer proved to be wrong by Copernicus
 - Ancient Greek astronomer with an Earth-centered theory
 - Influential second-century Greek astronomer and geographer
 - Copernicus proved him wrong
 - Ancient astronomer who wrote the "Almagest"
 - Influential second-century astronomer
 - Second-century astronomer and mathematician
 - Cleopatra's dynasty.
 - Dynasty of ancient Egypt.