New post in Spacetime

Is the future predetermined and fixed?

January 7th, 2023

Off-diagonal terms in metric for 4D space-time

October 1st, 2022

Is subspace a "real" theory?

August 7th, 2022

What is space made of itself?

October 12th, 2020

What is the limit of the universe?

May 17th, 2020

Does time exist without Gravity?

February 21st, 2020

How do we know we live in 3 dimensions?

September 22nd, 2020

Proof that Energy Momentum Tensor of Scalar Field Theory satisfies Weak Energy Condition

March 10th, 2020

If something is not moving in space, is it moving on the time axis at the speed of light?

July 18th, 2020

Does isotropy imply homogeneity?

August 1st, 2022

What if the size of the Universe doubled?

February 28th, 2020

Is my interpretation of how a gravitational wave is formed correct?

October 21st, 2020

Does time dilation cause gravity as explained in this video?

August 13th, 2022

Does an object creates gravitational waves when only accelerating in one direction?

December 17th, 2020

Commutation relations in QFT and the principle of locality

July 7th, 2020

Why should one expect closed timelike curves to be impossible in quantum gravity?

May 20th, 2020

How can I vizualize and understand curved spaces in general relativity?

February 27th, 2020

Why does the universe exhibit three large-scale spatial dimensions?

December 1st, 2020

Is there a geometric interpretation of the spacetime interval?

October 14th, 2020

Killing tensor in the Kerr metric

August 1st, 2022

What manifold is spacetime?

August 1st, 2022

Is spacetime absolute?

August 1st, 2022

Does speed of light being constant make time a derived unit?

August 1st, 2022

Is time sped up when orbiting a black hole? Why? What does that mean?

August 1st, 2022

Can anyone explain me how time can bend according to Einstein in simple way?

July 3rd, 2020

How to prove that we are living in a 3+1D world?

August 4th, 2020

Orientability of spacetime

September 2nd, 2020

Spacetime diagram of a collapse of a rotating star

September 13th, 2020

Why no gravity lens around planets?

July 22nd, 2020

Does Special Relativity Imply Multiple Realities?

December 30th, 2020