Recent content by se00064

OK, so I'm trying to invert a 3x3 matrix in fortran 90/95 (apparently they're not that different). I have a function to calculate the determinant already, and I am trying to write one to find the cofactor of a given element. So far I have the following as a function where ii is the dummy...

Thank you for your patience and advice.

So our conclusion that the universe is expanding to this day is based on the observation that at some point in the past we know it was expanding, and we do not know of any reason in our laws of physics that would cause it to stop expanding (roughly speaking)?

Gravity?

I wasn't questioning whether the laws of physics are changing, but only the state of the stars. For instance, the furthest visible stars from us could actually be changing direction and contracting back again, but we could not know since the light we see from them was sent millions of years ago...

Hi, my question just came to me the other day, and I can't appease myself as to the answer. Basically, I am unsure as to how we know the universe is expanding right now at this present moment in time. If our observations of the red shift are all from galaxies and stars that are extremely far...