Cassiopea or Cassiopeia: How To spell?

The word Cassiopea is misspelled against Cassiopeia, a noun meaning "A constellation of the northern hemisphere, situated between Cepheus and Perseus; -- so called in honor of the wife of Cepheus, a fabulous king of Ethiopia."

Word contains consecutive vowels 'EI' in between alphabets cassiop & a is misspelled as 'E' as letter 'I' is phonetically ignor
Wrong Spelling:  cassiop-e-a 
Correct Spelling:  cassiop-ei-a 
Find more incorrect spellings of Cassiopeia to spell right way.