Reply to post: Re: Riddle me this:

H0LiCOW: Cosmoboffins still have no idea why universe seems to be expanding more rapidly than expected

Baldrickk Silver badge

Re: Riddle me this:

My A-Level Physics education says that it's Space-Time that's expanding - so everything is naturally drifting apart, but the forces involved in holding things together (strong, weak, gravity) ensures that like you say, the effect is overruled by these forces.

In fact, while it's a significant expansion taking the whole of the visible universe into account - our galactic cluster is just that - a cluster held together by gravity, even over that huge expanse (many galaxies) and is actually shrinking, despite the expansion of space time.

This is why you have to look at distant galaxies to view a significant red-shift.

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