Recent content by RobbyQbit

From your other post "Inflation starts in a universe 10^-53 m size, 18 order of magnitudes smaller than the Planck length." This is what I mean when I say "Incomprehensible". The amount of energy packed into that entity.

I hear what you're saying Rod. I forget sometimes that this is theory. Some good links to read. I must get myself a telescope some day or should I say a time machine, as what you observed was 45 minutes in the past 😀

According to inflation theory, during the inflationary epoch about 10^-32 of a second after the Big Bang, the universe suddenly expanded, and its volume increased by a factor of at least 10^78. In my small mind I liken this to switching on a set of Christmas tree lights in the dark. It's there...

My understanding is the APPARENT slow down of light in a medium is the absorption and re-emission as you mentioned, but that the light still travels at c

Bill, so a photon from the Sun takes approx 8 minutes by my clock to reach my eye, but to the photon itself it's instantaneous since it does not experience time. I assume because of length contraction it has no experience of distance either?

Thanks astronic. So, hypothetically, if I was still here observing in 93 billion years time (or maybe less if that's a diameter) would I be seeing light from that distance (even though that light source has since moved even further away)?

I misunderstand why we think/know the observable stretches 93 billion light years diameter and yet the most distant we observe is 13.8 billion years old?

And there's the rub Bill. Every point in the Universe sees itself as at the central point.

Of course, matter did not exist then. But what is the definition of space. What actually is space. Physically, what is space? Blue shifted being the stuff approaching us?

The one thing I struggle with is where was the centre of the Big Bang and is there a centre point in the universe or is BB the centre ? It's easy to think that we sat here on Earth are at the centre. But that isn't the case. How do you visualise this yourselves? Is there actually a centre point...

Thanks Helio

Thanks for the links Rod

Have exoplanets been observed in the visible spectrum or are they too distant outside our solar system ?

When I was younger, I used to think Aliens were already amongst us but in a different part of the EM spectrum that is not visible or a frequency that we cannot yet detect. Or maybe they lack the Higgs Field as we know it now.

Not wishing to trivialise anything here, but could Dark Matter not be dissimilar to the Dark Ages when protons, neutrons and electrons were just free and not bound to form atoms, where photons just got scattered by electrons and there was no visible light. Or is it that because they weren't...