Stump the Christian?

[dyresand]

What i am trying to say is dark energy/matter is a thing. We know its there because we know the universe expands. The stars galaxies that NASA takes pictures of isn't even there anymore. Rather the light from said galaxies are reaching us and giving us a peek into what was there at that point. To explain that a bit better, distance in a vacuum that being said stars in the night sky when you look up might not even be there anymore because light and information takes light years to reach us. So those galaxies nasa has taken pictures off aren't even there anymore due to expansion. Stars and other formations more than likely gone. That being said when they do reach there eventual collapse and go supernova and or collapses into itself turning into a black hole. We will still see a star but once again it would take billions of light years for new information and or light to reach us.

And what I am saying is you do not even know if it is a thing.  You suppose it to be a thing.  Just a dark matter is not necessarily stuff but could be explained by alternative theories of gravitation.  All you know is the current theory is not accounting for an observable phenomenon.  So, if we are honest with ourselves we will recognize dark matter and energy are just another way of saying there may be something and since we do not know what that something is we will say it is matter and energy because the former (under our current theory, which is not accounting for the phenomenon) would need to supply extra mass within galaxies (but not between galaxies) and the latter would need to supply extra energy between galaxies (but not within the galaxies themselves).

I do know that dark matter/energy is a thing. Scientists have found ways of detecting it using gravitational lensing. They do this light going through the gravitational lens is similar to light going through a optical lens it gets bent. When light from the distant stars passes through a galaxy or cluster the gravity of of matter present in the galaxy or cluster causes the light to bend. As a result the light looks like it is coming from some where else rather than its origin. That being said when you do get that gravitational lensing effect you have found dark matter/energy.