[Jataro Kemuri]

So I have a point to make. If galaxies and solar systems are flat, then why couldn't earth be flat? Physics has already proven that it is galaxies and solar systems are flat. From here on, I will use the prove of galaxies and solar systems being flat to argue that the earth is also flat. Circular motion is dependent on 2 factors: tangential velocity and the centripetal force or the gravitational force in this case. As the particles approach the poles, rotation around the poles are not stable, as the gravitational force is not the centripetal force to make the particles go in circles. In that case, the particles will either collapse to the center of the earth of be flung away. So the earth cant be round.

[MattyWS]

So I have a point to make. If galaxies and solar systems are flat, then why couldn't earth be flat? Physics has already proven that it is galaxies and solar systems are flat. From here on, I will use the prove of galaxies and solar systems being flat to argue that the earth is also flat. Circular motion is dependent on 2 factors: tangential velocity and the centripetal force or the gravitational force in this case. As the particles approach the poles, rotation around the poles are not stable, as the gravitational force is not the centripetal force to make the particles go in circles. In that case, the particles will either collapse to the center of the earth of be flung away. So the earth cant be round.

So in your mind, the solar system and the galaxy exists. Can you use that same logic of yours to explain why every other planet in the galaxy that we have observed are spheroid apart from earth?

[JCM]

As shown many many times on this forum, the gravitational pull towards the center of the sun, earth, planets is greater then the centripetal force trying to flatten them.

The acceleration due to gravity at the earth's surface is about 9.8 m/s2, whereas the centripetal acceleration is only 0.033 m/s2.  This explains why water can stay on the surface of the globe as 9.8m/s2>>>.033m/s2. 

[Curiosity File]

Somebody can correct me if I'm wrong. In layman terms, a body in motion, in these cases spinning, tends to flatten them out. RE is not spinning fast enough to flatten it out, plus it's mass is too dens to be flattened.
FET the disc is not spinning from my understanding. So that's not the forces causing the earth to be flat.
Galaxies are spinning/spiraling, although are not a solid body but are, in fact, spherical towards the center. Galaxies are made up of billions of spherical celestial bodies.
Solar systems that have celestial spheres orbiting on a common plane millions of miles apart is not the same as a solid mass being flat or spherical.
 
   

[LoveScience]

Entirely right. The polar flattening effect is present in all the planets and is most evident in the gas giants. Not entirely surprising since they also have the fastest rotation rates.  So yes if the rotation speed of a planet was fast enough then in theory it would flatten out completely into a disk. However that hasn't happened so we have oblate spheroids rather than flat disks.  Sorry FE supporters but that's the reality of it.

The solar system formed from an accretion disk comprising of interstellar gas and dust. This material formed a disk around the equatorial plane of the young Sun due to gravitational rotation. Collisions occurred in places within the debris creating clumps that got bigger and bigger and these went on to form the planets. That is why all the major planets exist in the same plane around the Sun.


I can't write a book on galaxy formation here so in a sentence...A similar effect is present in the galaxies throughout the Universe. In the early Universe galaxies were smaller but also much more numerous. Collisions occurred and this led to larger galaxies being formed and again rotation squashed them into disks with a central bulge.

 

[teinf]

You cannot use existing Physics to prove that the Earth is flat, because existing Physics says: the Earth isn’t flat.  Duh!

[juner]

You cannot use existing Physics to prove that the Earth is flat, because existing Physics says: the Earth isn’t flat.  Duh!

Refrain from low content posting in the upper fora. Warned.