Recent content by Starlover

Thank you, Pervect. It was kind of you to take all this time!

Thank you, Ibix! I see I was way off. I'm glad I asked! :)

I'm wondering about the relationship between F=ma and E=mc2. Is it simply that, at relativistic speeds, E=mc2 replaces F=ma? (much like D = v x t is replaced by the Lorentz Contraction at relativistic speeds)

Fresh_42, I think your answer helped me figure things out. I think the answer to my question is that Einstein's Cosmological Constant is not a "universal constant" (like the speed of light) because the Cosmological Constant was proven untrue when the universe was shown to be expanding. Thank...

Thank you for replying, DaleSpam. I seem to see "universal constant" used interchangeably with "cosmological constant." That's why I wonder if they're the same thing. The best I can figure out, is that a "universal constant" is any constant in the universe (such as the invariance of the speed...

Are the cosmological constant and the universal constant essentially the same?

Thank you, everybody, for your replies. It's very kind of all of you. I simply might not be sophisticated enough for this forum. BTW, Andrewkirk, what I meant by "he moved through time at XX speed" is "XX amount of time elapsed during his trip (relative to time on Earth)." Is that of any help?

Andrewkirk, thank you for replying! Is there any chance you could give me an example -- in sentence form -- with numbers? Something like this: "Jack's ship was moving through space at XX (SPEED). This means that he was moving through time at XX (SPEED), because ______ (movement through...

Hello Everyone! I have a question for better minds than mine. :) This pertains to speed through space plus speed through time always needing to equal the speed of light. I believe I've read that in order to add speed through space and speed through time, we would convert the two numbers to...

Thank you, Matterwave, SteamKing, and Dave! Your answers are all helpful to me!

Hello, All! Could a wormhole take us to a different time, but the same place? (Meaning, is it possible for the two mouths of a wormhole to be separated only by time, and not by (significant) space? Thank you very much!

I've read different reasons for the reciprocal illusion experienced by the twins (the slow-motion effect). I've not been able to understand the reason that the traveling twin would see the earthbound twin moving in slo-mo. Can anyone offer a simple explanation -- or is there actually no...

In theorized travel to the past -- in particular with a closed timelike curve (CTC), why is it possible to only go back in time to the point at which the CTC was created? Questions related to this would be: 1) Can space curve into a CTC if it was not originally in a CTC? 2) How can we be sure...

When we measure distances in space -- for example, when we say a star is 20 lightyears away -- are we measuring in a straight line ("as the crow flies"), or are we including the dips and curves in spacetime (that light travels along)? Thank you in advance?

Hello, Everybody! I'm new to the board, and am happy to have found you! I have six questions I can't seem to find the answers to, either in books or online -- yet I know the answers are out there! I'll post each question in a separate thread, and hope that someone who knows far more than I do...