Recent content by smaricic

Thank you for your answer. But aren't some frames of reference more valid than others? Isn't the Copernican view more valid than the view that says the Earth is the center of the Universe? If the Earth is the center, and all the stars rotate around us every day, aren't many of those stars...

Thanks for your answer. I'll try to understand it.

Perhaps I wasn't as clear as I should have been. Since she believes that she is at rest, and the Earth is moving away from her, and since she believes in time dilation, she "knows" that the Earth clock must have read a smaller amount. This is what I wrote in the opening summary: RocketGirl...

Thank you for your answer. It is obvious to me that you know much more about physics than I do. I passed high school physics years ago, and I am no kind of scientist. I am what a physicist named Clemenza once called "a pain in the ___ innocent bystander." Still, I am pretty good with basic...

This is based on Professor Brian Greene's wonderful 11-hour course on Special Relativity which I watched recently on YouTube. RocketGirl is travelling to Proxima Centauri, which is 4.25 light years from Earth. She is moving at a constant velocity of 80 percent of the Speed of Light and will...