My basic understanding is that no matter how you observe light, it always a constant, it always travels at the speed of light.
So even traveling at near the speed of light you will always measure light traveling at the speed of light. If this is the case? Why do we observe red shift?
During the first second of the Big Bang a mind boggling amount happened. So much so that we need to measure it in plank time to appreciate all the stages that occur. And in that 'bang' spacetime was created.
My question is this. As space dilated would time not dilate? Meaning. If I were able to...
This is only my second post and I am a novice. So please excuse me if this is a naive post.
Gravitational lensing around galaxies shows more distant galaxies hidden behind them. We estimate the universe is 13.8billion years old because that's the limit we can observe into 'the past'.
My...
Thanks very much for all replies.
As to the big bang being the result of a black hole. I'm very sceptical. Juries out on that for me.
Phinds. My novice status shows through. As you say it's gr not sr.
Although we don't know what dark energy is. I'm sure we can, and work is-a-foot to...
Thanks for the parking space analogy phinds. Puts it into perspective. So the expansion force is massively weaker than gravity. But on such large scales has a huge effect.
But... What about dark matter and dark energy?
Dark matter plays a large part in galaxies. And is a major factor in...
Thank you all for your responses.
Your answers have raised as many questions as have been answered! As seems to be the way in this field!
If the expansion cannot overcome gravity, hence cluster remain. Then, as explained, only the space where no, or very little, gravity can exert its...
Firstly, apologies if this is the wrong thread for my post. Please direct me if wrong.
My first observation was this!
If the universe is expanding at all points away from each other. Should that not mean that everything including us, our instruments our measuring tools and, in fact, the...