Is there an absolute sequence of events in the universe- independent of observation? It seems like so much emphasis is put on our delayed observations rather than what is actually happining in Reality. As I read through the forums, it almost seems as if people do not believe that there is an...
Is it correct to say that the energy density of expansion energy was greater in the early universe? Or does it seem to be constant or increasing over time?
Thanks Mordred, the links and info are very close to what I'm looking for. I am most interested in the cosmological redshift (not doppler) and the lookback time. I want to get a better feel for the rate of expansion.
Based on this info (from the history of cosmology link, great link!):When we...
Is the increase in wavelength exponential as distance increases? What equation do we use to predict the amount of redshift? And what is the cause of the increasing wavelength?
Do electromagnetic waves expand as they travel across the cosmos? e.g. Do the wavelengths of emitted light, from distant galaxies, have longer wavelengths when they reach Earth than they did when they were emitted?
this model also suggests that time dilation in velocity (apart from acceleration) may be an observor's illusion- as in the instance when we believe stars in distant galaxies are aging more slowly simply because they are moving away from us. take the instance of a galaxy receding at nearly the...
In this model, it seems we are holding light as fixed in space. If there is any inflation, it would seem to be because space was "flowing" into that initial sphere of light and miniaturizing everything inside of it- from atoms to galaxies. If space is isotropic and homogenous (not spring loaded)...
Perhaps our universe is the result of another universe's collapsing star or primordial black hole, and every black hole in our universe is the possibility of yet another universe- filled with untold more universes. Maybe the black holes themselves are acting as drains for space- from older...
Yes, I see what you mean. In our case we hold the ratio of distance to time to be nearly 300,000km/s. But if that 300,000km ruler is a rigid body then it would seem to come up short measuring the light that was emitted only a second prior; because that light emitted only a second prior would...
is not the measure of light simply a measure of time? if our rulers are shrinking and we measure light to be the same speed then time must be slowing at the same rate. it seems our perception of time is as a fish's perception of water- per chronos' post-script.
aside from the math, if we hold a theoretical edge of the universe constant, and everything inside as shrinking, then isn't the speed of light changing as our rulers literally get smaller to measure it. though I understand that would make our clocks slower, so we wouldn't perceive it as slowing...
great link!
if we are shrinking- relative to the size of the universe and the light that is moving away from us since the big bang- then we must be shrinking at an accelerating rate. could this be the cause of our perception that cosmological bodies are moving away from us? it seems that...
thanks chalnoth,
although the distance that light has traveled since the big bang cannot be measured, are there any theoretical models that hold the size of the universe- as measured by the expansion of light since the big bang- constant? in a model like that it would seem that everything...