unit of distance in astronomy: crossword clues

Matching Answer
Confidence
PARSEC
60%
EON
60%
MILE
60%
ERG
60%
STEP
60%
SPAN
60%
METRE
60%
DIOPTER
60%
EPOCH
60%
PACE
60%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)