Question: Is there a limit to how far we can look into space? I

Pete Etchells answered on 26 Apr 2012:

In theory, yes – we can only look as far as something that is emitting light, i.e. a star. It’s also dependent on the time at which a star started to emit light too – for example, if a star that is 500 million light years away only started emitting light 100 million years ago, we would have to wait 400 million years before we could see it!