Recent content by Pjpic

But on a personal level I am very interested in keeping a discussion of "is the universe infinite or not," which is the topic of this thread, on a scientific basis.Maybe there are different definitions for "universe" and for "infinity"; that might be causing some confusion. Even "is", might...

I'm not very conversant in the subject. But it is my impression that the acceleration of the expansion of the observable universe has generated a theory that there might be a new particle (field?) call the inflaton. On the other hand, I thought I'd heard that scientists were trying to find...

I think I get it. Powers make a curve.

Wouldn't that be a straight line instead of a curve?

What is the equation for a curve where x approaches infinity as y approaches infinity?

a) The density of a black hole doesn't create the same effect? b) Does the energy driving the current expansion decay into particles?

Is the theory that inflatons become dominate when gravity is strong (as in right after the big band) and when gravity is weak (as in driving the current expansion of the observable universe)?

This is from Wiki In Big Bang cosmology, the Planck epoch or Planck era refers to the earliest stage of the Big Bang, before the time passed was equal to the Planck time, tP, or approximately 10−43 seconds.[15] There is no currently available physical theory to describe such short times, and it...

If it is not know what happened in the first fraction of a second after the big bang, how is it know that it was really only a fraction of a second?

. Where is the void. This sounds like a "boundary" question. I have trouble following the definition of terms concerning around what seems to be different types of boundaries. As far as I can tell, which I suppose you can tell isn't far, there is no reason to believe in the embedding in...

I want to build a model of how the ecliptic interacts with the horizon. The horizon appears to be a flat circle, so I thought I'd use a CD sized shape for that. What shape would I use for the ecliptic, and how large relative to the CD? I would like it to be as close as possible to the my...

If there was no mass/energy would space time still exist? In other words, does on space time only exist because of an interaction between two points of energy?

When the observable universe was the size of a baseball, did its gravity (field?) extend to (as opposed to towards) infinity?

If two particles are moving apart, how is it determined if they are moving through space or if the motion is due to the expansion of space-time? Especially if there was no other frame of reference.

How does the universe's expansion relate to Newton's 1st law. In other words, is all the expansion due to an unknown cause at the big bang and the 4 forces now act on it? Or maybe is the expansion not really due to a force (as is gravity) so the 1st law doesn't apply?