How can I understand the 5th dimension? What exactly is it?

I see some of the answers here take the idea of time to explain higher dime Space · 143.3k followers Anything related to Space António Viegas, Public Agent Shared Jan 30 How can I understand the 5th dimension? What exactly is it? I see some of the answers here take the idea of time to explain higher dimensions; but time is just a mathematical dimension. There are seriously more than 3 physical dimen... Read More » Marco Leonardi, BSc Astronomy, University of Bologna (2023) Shared Feb 8 What is the need for a theory that uses particles called gravitons; Doesn't Einstein's general relativity explain the idea of gravity well e... Darn good question. Let me write down first an equation that is Einstein's crowning achievement (and no, it's not [math]E=mc^2[/math]): [math]R_{\mu\nu}-\dfrac{1}{2}g_{\mu\nu}R=8\pi GT_{\mu\nu}.[/math] Without going into details, the essence of this equation ... Read More » António Viegas, Public Agent, Portuguese. Bilingual. french schooling, Shared Feb 3 Why does NASA give so much attention to Mars, but so little to Venus? Venus is not easy to reach. That might seem counter-intuitive but it takes more energy to reach Venus than Mars. Consider this. You need to expend the same amount of energy ... Read More » Read more in Space This email was sent by Quora (605 Castro Street, Mountain View, CA 94041). You were sent this email because you might like Space. If you don't want these updates anymore, you can mute Space or unsubscribehttp://www.quora.com/