That is very dangerous because it could imply infinite recession velocity. That means in a Universe that is been around for a finite amount of time, something has managed to appear to go away from us at infinite speed?
Drakkith, I meant just that. No need to apologize :)
Nothing needs to exist for time to pass. Do you need to be alive for us to reach the next day. You said "The measurement of time is based on regular cycles of some sort, such as the oscillations of a crystal or atom"
of course we would need...
Yes, you are absolutely correct! but in an early universe, there was a point at which the distance might not have been big enough to cause a recession velocity that was faster than the speed of light. KEYWORD: MAY OR MAY NOT
I think the rate was different. Isn't that why inflation was put in? I believe that the rate has slowed?
I was confused myself but apparently, inflation (the ridiculously crazy expansion that flattened the Universe into uniformity said to be caused due to "reverse gravity") is a little...
Yes, but what is time itself? We define it as the duration between 2 events. Actually, it a measure how many specific regular/periodic events occur between the 2 events occurring that we are trying to measure.
I honestly think that time is not an entity at all but something we as conscious...
We recently touched upon a topic/calculation in my Astrophysics class where things were indeed moving away from each other at the speed of light. Unfortunately, I just returned my rental Astrophysics book.
I would say that the Universe expanded ridiculously fast (just like galaxies receding)...
Why would the Universe expand at all if it is an infinite Universe? Seems like there would be no reason for any mechanism to operate to expand the Universe if it wasn't expanding it to an amount that was "balanced" so to say. This might sound like a bad question because it might imply purpose...
Well, I see there has been an intense debate.
Well, I'll start my addressing the first replies since my last post.
I haven't reviewed Cantor but does it have to do with claiming 1 infinity is bigger than the other? This would seem like a contradiction and most likely is. Even if there is...
See but that's just it, we are answering infinity with infinity.
For example, when you say that the wavelength could tend to infinity, how can that possibly be true other than in theory? I mean assume that the wavelength keeps getting longer and longer, the frequency will decrease (more...
Also, we already have a limit for how fast information can travel in the Universe which is the speed of light. How then would there be any space for more advancement in communications. It would not seem plausible that fictional aliens could communicate any faster than us other than maybe being...
A question about radio waves and waves in general. We are all familiar with the EM spectrum. In principle, we know that we can wavelength and f are inversely proportional and in theory, it infinite but I read on Wikipedia that the expected limits for wavelength are the Planck length at smallest...
How do we deal with the concept on infinity? It seems to linger about the limits of everything.
For me, this is the biggest problem in some sense. I wanted to ask the question in the context of the the multiverse. This is a big trend now in physics and cosmology and usually gets lots of...
Yes, I should have check what it might have been from LEO. I'll look into the Oberth effect but is this essentially simply because the circular velocity in LEO larger than GSO?
Also, I used GSO's in both cases so at least comparatively, hopefully, I still got the right answer as to which is...
Also, thanks a lot D H and Janus. You guys have been very helpful!
I just think at this point, I am finding it hard to understand a lot of stuff you are saying for example doing prograde burn and then going beyond earth, then transferring into elliptical orbit which passes through Sun.
The...