Notices where this attachment appears
-
Embed this notice
@merchantHelios I didn't know that, neat!
Related, the evidence for the big bang is that most everything on the galactic scale seems to be moving away from us. However, scientists tend to apply a "universalist" approach to physics (basically, anything true for us must also be true everywhere else). So instead of assuming that everything is moving away radially from Earth, they say the scale of space is what's expanding, so that everything seems to be moving away from everything else.
There is somewhat of a good reason to assume this, the main proof being "Hubble's Law", which demonstrates that we can predict how far away something is by how fast it's moving. This would match the scaling effect of space stretching equally everywhere. This is best demonstrated, I think, by laying the same image on top of itself, and increasing the scale of one. As you move it around, you can see how everything seems to move away from the point where both images align.
Anyway, this explanation isn't perfect. One of the biggest flaws is Dark energy. Basically, Dark energy appears to be something that is changing Hubble's Law, meaning that you have to add an additional fudge factor to it to account for an increase of speed over distance. No one knows why.
Part of me wonders, if the Universe were to have "exploded" from a central point like Earth, would it not make sense for the material on the outer edge to be moving faster, and to do so non linearly?