https://en.wikipedia.org/wiki/Twin_paradox
True or not?
Obviously, you can repeat things already written.
And consider me stupid that I do not understand them.
The problem is that in this reasoning we consider the Earth fixed and the spacecraft as moving. That's why the brother in the spacecraft will be younger than the brother on Earth.
But from the perspective of his brother in the space ship, he could be fixed, and the Earth is moving. The reasoning goes aut. The brother on Earth should be younger.
Experiment with the two planes that have atomic clocks mounted on them, we can comment.
True or not?
Obviously, you can repeat things already written.
And consider me stupid that I do not understand them.
The problem is that in this reasoning we consider the Earth fixed and the spacecraft as moving. That's why the brother in the spacecraft will be younger than the brother on Earth.
But from the perspective of his brother in the space ship, he could be fixed, and the Earth is moving. The reasoning goes aut. The brother on Earth should be younger.
Experiment with the two planes that have atomic clocks mounted on them, we can comment.