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Yeah that’s why I said as far as we know we can think up and theorize many a thing but the evidence we have suggests it’s flat

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the argument I’d give in return is that it only appears locally flat (local as in the entire observable universe) because the total thing is much larger than 93 billion light years across. Like if your entire observable universe was Kansas, but you didn’t know Kansas was part of a globe.

The margin of error for positive curvature is 0.4% so… within the limits of things that are known and possible.

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It’s not proven to have positive curvature like a balloon, at the largest scales we could measure the universe has no base curvature. It expands in every direction all at once like dots on a balloon but isn’t shaped like it as far as we know

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Forces have an effective range. At the sub-atomic range, the Strong and Weak forces act on particles like quarks. Above that is is the electromagnetic force which works at the atomic level to the macroscopic level (normal everyday experiences). After that is the gravitational "force" which works at the normal everyday objects like apples, cars, rockets, and people to galaxies, local clusters, and superclusters. All of the above forces are orders of magnitude stronger than the dark force that caused the expansion of the universe.

So, the space between superclusters is vast and gravity no longer hold sways over the space fabric so it stretches.

One posit is that gravity is not a force but rather a time gradient around mass. The closer you are to the central mass the greater the time curvature so the differential time difference causes you to spiral downward through space instead of an actual field that interacts with a particle (like photon to the electromagnetic field or the Higgs boson with the Higgs field to give us mass).

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Just to add some numbers, Sagittarius A* is 10⁶ solar masses while the Milky Way is 10¹², a million times more massive; comparable to the difference between the Earth and the Sun.

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Doesn't 120° cause heavy shimmering regardless of humidity?

The "light" emitted at the end of the "dark ages" occurred in an instant? 370,000 years after the big bang. Did that mean it happened "everywhere " at the same time? Also, since all other celestial light sources have their distances calculated by their red shift, what is the distance to the universe at that time? Thanks

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Supermassive blackholes aren't nearly massive enough to hold together galaxies. If Sagittarius A* disappeared tomorrow, the Milky Way would be pretty much unaffected.

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