Why Gravity Exist??

[Harshit Mishra]

Newton stated that each object was attracting each other, but Newton could not answer what caused this attraction.  Time passed and the great scientist Sir Albert Einstein solved this problem with his Theory of Relativity.

Albert Einstein defined Gravity by the concept of space-time, according to Albert Einstein, gravity is a curve in space-time. You may not have understood this very well and perhaps I cannot explain it to you through this blog, so let's do a little experiment first. You can also take this video if you want

 

 

 

    As shown in the video, Suppose space-time is not like a fabric on which our planet stars, satellites, etc. are located, so the larger the mass of the object, the more it bends the space-time, then this is the reason. Have you understood <a>why gravity exists</a>...

[Col Not Colin]

Hi.  I hope you are well.

43 minutes ago, Harshit Mishra said:

As shown in the video, Suppose space-time is not like a fabric

Is that a typing error or did you really mean it is NOT like a fabric?

This also has some connections with a thread started by Mordred in the General Relativity section.  Specifically space is NOT filled with a fabric material.  Here's a link to that discussion:

 

Your last question was "Have you understood why gravity exists?"     No, not really.  Few people like the stretchy fabric model as demonstrated in that video.  It's full of problems.  Here's the two obvious ones:

1.  There isn't any "fabric" in space.

2.  The distortions were created by gravity and not really directly by the mass.  If you took that stretchy fabric into outer space well away from any gravitating source and placed some mass on it, it wouldn't bend and distort.  People argue you are using gravity to try and explain explain.

 

However, looking on the positive side.  That stretchy fabric analogy has been used for years and it' OK.  It does get some ideas across to the audience.

[beecee]

48 minutes ago, Harshit Mishra said:

Newton stated that each object was attracting each other, but Newton could not answer what caused this attraction.  Time passed and the great scientist Sir Albert Einstein solved this problem with his Theory of Relativity.

Albert Einstein defined Gravity by the concept of space-time, according to Albert Einstein, gravity is a curve in space-time. You may not have understood this very well and perhaps I cannot explain it to you through this blog, so let's do a little experiment first. You can also take this video if you want

 

 

 

    As shown in the video, Suppose space-time is not like a fabric on which our planet stars, satellites, etc. are located, so the larger the mass of the object, the more it bends the space-time, then this is the reason. Have you understood <a>why gravity exists</a>...

Spacetime is not a fabric per se. Curved/warped spacetime, in the presence of mass/energy, is what we feel  as gravity. Gravity is spacetime geometry. Why? We don't know.

[Phi for All]

55 minutes ago, Harshit Mishra said:

perhaps I cannot explain it to you through this blog

!

Moderator Note

This is NOT your blog. It's a science discussion forum. If there's an aspect of gravity you'd like to discuss with the other members, or questions you have regarding its nature, please give us a good place to start. No lectures, please, this is more like a roundtable talk. Conversation, rather than preaching.