Recent content by N721YG

You guys are above my head but according to http://www.zionism-israel.com/Albert_Einstein/Albert_Einstein_Ether_Relativity.htm Einstein said: "Recapitulating, we may say that according to the general theory of relativity space is endowed with physical qualities; in this sense, therefore...

I am waiting for an expert also but I understand that two inertial frames moving relative to each other have symmetry. It is the acceleration that breaks the symmetry and causes one twin to get older then the other. Also consider GR and gravitational potential on the trip. The gravitational...

After reading that I actually understand what is being said here. Good site that I can easily understand. Need to read more there. I have a few questions but will start my own thread so I won't hijack this thread.

I probably should have said "In SR the the lack of curvature of space can be consistent with speed over long distances. Thanks for your reply. Things slowly come into focus.

Lets make sure I understand what you are saying. In SR the curvature of space can be consistent with speed over long distances. In GR the gravitational effects change over short distances so the reference frame is small.

I was satisfied with DaleSpam's post but now you have me thinking. :smile: Am I correct to say that as long as you are observing from the same reference frame all laws will apply and c is c? If you could observe from outside the gravitational effect of the black hole the light would appear to...

A third party observer can observe an object moving to the left at .75c and an object moving to the right at .75c for a separation speed of 1.5c. The left and right object will see themselves moving apart at .96c. Is that what you are asking?

I would also like an expert opinion on this but am not sure of your actual question. I understand gravity curves spacetime. On earth, gravity from the Sun and moon cause the tidal forces. You do not need tidal forces to bend space time.

I agree, There was a time when crossing the Atlantic was impossible. I am sure there were many folks back then thinking just like many in this forum are thinking now. It won't be that hard to do with the know how and equipment just like space flight is routine now. My parents would have...

Not at all. It is just that things are taken out of context when read out of order. In post #9 yenchin said: " Space travel is not just about exploration though, it is essential for survival of any advanced species if they were to live pass the life time of their star. When the Sun goes...

Let me guess, republican. I usually vote conservative but that is just so I can keep my guns so I will be able to get food when things go down. :smile: Lets say the "environmental alarmist" are 90% wrong. Then it would be your kids kids rather then you kids that endure the issues. Or do...

I believe it was the History channel where I first heard it but a Google search will find more articles then you can count. I am not sure who is the most reputable source but for starters...

Scientist say we are already using 30% more resources then the Earth can sustain and by 2050 it will take two Earths. Most seem oblivious to the obvious out come in their children's future. Despite all the marvelous things humans have accomplished, it seems we may not have the "Right Stuff" to...

I suspect any confusion was that many think it would take 100,000 years at the speed of light to cross the Milky Way. My intent was to point out it takes much less time. 12 years to cross and I did later add 24 if you want to stop (and live). 12 years, 24 years or 100 years, the point was...

I don't see so much bad information but a lot of opinions based on speculation. Speculation is all we have in some cases. However, we do understand length contraction, time dilation and SR well enough to come up with real #'s. A rocket at 1G continuous acceleration will go 100,000 ly in...