@YoMomz

Outer Space is not a perfect vacuum

Think of it like a gas or plasma with a lower density than air near the surface of the earth but a higher density than zero

When light is red shifted it is assumed that an object is traveling away

Because all light coming to earth is red shifted relative to the expected emmission pattern it is incorrectly assumed the Universe is expanding

But as light travels through a medium it can be red shifted

The Universe is not expanding

Big bang is wrong