While I do not know what religion she is, this question may refer to a hoax that has been around which claims that she converted to Islam because of things that she saw while on the moon. The claim refers to her as the 'first Indian woman on the moon'. This is completely false. Not only is she not the first Indian woman on the moon, there have been no women at all on the moon as yet. She did live on the ISS for a time, but definitely did not go to the moon! The gross factual errors alone show the credibility of the claim. Similar claims exist about other celebrities.