Given that the eternal God is pure act would this entail that the creation of the universe is eternal yet the universe being a movable object does not necessarily imply that it is eternal within itself.
I'm not a physicist or anything but would this also in some way give answer to the paradox that because we scientifically know space-time (the universe) has not always existed and only came into being at the big bang yet it can not properly be said that time has a beginning since this would imply that there was a time before this to initiate a beginning.
For some reason I can't find a concrete answer to this in Aquinas. It has been a while since I've studied him though.