In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: More importantly , the discovery of celestial bodies orbiting something other than the Earth dealt a blow to the then-accepted Ptolemaic world system .
A:
More importantly , the discovery of celestial bodies orbiting something other than Earth dealt a blow to the then-accepted Ptolemaic world system , which held that Earth was at the center of the universe and all other celestial bodies revolved around it .