1670. But whether they had been from some satellite of Jupiter which, like the moon, is not surrounded with the same atmosphere, and therefore whether those living on that little world had been differently created, or furnished with a different body, this I do not as yet know, although they have said so. For because I am unable to form a picture of people other than those who live on planets surrounded by an atmosphere, therefore, although this is unknown to me because I cannot imagine it, I do not want to reject it out of hand. For bodily shapes are entirely according to the condition of the atmospheres and many other circumstances on the planets where they are. 1748, 23 March.