Scale of the Universe
- Thread starter ema
- Start date
Thanks heyhey.
Here is a nice video I watched just a few days ago that eventually triggered this thread because I too went lost on youtube for a science binge.
It's about Al Jefferson, I mean, black holes. What would it be like to travel inside a black hole? It also refers to the center of the universe topic I mentioned earlier in this thread.
https://www.youtube.com/watch?v=3pAnRKD4raY
and not only that, but there's ALWAYS room for gello!!!!
an amazing concept, really, if you think about it...
Ahh, more shiverings! The universe is amazing.
Though I generally prefer some baklava or sütlaç(rice pudding) afterwards.
♪alt13
Well-Known Member
I don't buy into the whole universe is expanding thing quite yet.
It seems to me that the evidence(that light from other galaxies is red shifted)could be explained by other phenomena that do not require dark energy. For instance, a red shift can be produced when light passes through certain gasses. Dark energy is a tough pill to swallow which is why I will keep an open mind towards alternative theories that may explain a redshift in the cosmos.
I am not saying that the universe isn't expanding I am simply saying that it might not be.
It seems to me that the evidence(that light from other galaxies is red shifted)could be explained by other phenomena that do not require dark energy. For instance, a red shift can be produced when light passes through certain gasses. Dark energy is a tough pill to swallow which is why I will keep an open mind towards alternative theories that may explain a redshift in the cosmos.
I am not saying that the universe isn't expanding I am simply saying that it might not be.
♪alt13
Well-Known Member
I may just be playing mad scientist but..
It seems more likely that we do not fully understand light and that there may be a natural frequency decay for photons. As opposed to an elusive energy source that is everywhere , strong enough to push galaxies apart, and have no measurable effect on stars planets and people. The amount of Dark energy required to push galaxies apart at the rate required to explain the observed red shift is more than all other sources of energy in the universe combined, and noone has a good idea as to where that energy comes from.
It seems more likely that we do not fully understand light and that there may be a natural frequency decay for photons. As opposed to an elusive energy source that is everywhere , strong enough to push galaxies apart, and have no measurable effect on stars planets and people. The amount of Dark energy required to push galaxies apart at the rate required to explain the observed red shift is more than all other sources of energy in the universe combined, and noone has a good idea as to where that energy comes from.
I'm open minded too about it. Actually I'm open minded about every modern theories that isn't proven with pure mathematics. For instance I have no doubt that prime numbers are infinite because it can be proven with pure math in a single line.
On the other hand, the nature of physics science requires open mindedness regardless. A few months ago I was reading a book that touch upon Bernoulli's principle and fluid dynamics and it is remarkable that even basic physics had to pass through countless renovations until it can attain a certain degree of certainty.
However, the consensus about the expanding of universe is very strong among the modern scientists. To be honest I believe it's the truth. Because the doppler effect(redshift, blueshift) has a strong ground in Astronomy. Many calculations and observations are based on this effect and the accuracy of the results are way too consistent for it to be from variable causes such as certain gasses.
I'm not much knowledgeable about the things that above the basics. Dark matter, quantum physics, string theories etc...
I see what you are saying and I agree.
♪alt13
Well-Known Member
Dark Matter and Dark Energy(as their names suggest) are two separate things.
Dark Matter is matter that we cannot directly detect.
Dark Energy is the force(we don't know what it is or if it truly exists) that is causing the expansion of the universe.
I think if one can mentally engineer an invisible force that would expand the whole of the universe, than one may just as easily imagine a force that would have an affect on the frequency of light.
Dark Matter is matter that we cannot directly detect.
Dark Energy is the force(we don't know what it is or if it truly exists) that is causing the expansion of the universe.
I think if one can mentally engineer an invisible force that would expand the whole of the universe, than one may just as easily imagine a force that would have an affect on the frequency of light.
Obviously I know that I didn't refer to dark energy.
But it's not the doppler effect itself that suggest the expansion. It's the results of calculations based on the effect. It's all basic cosmological distance measurement. Since there is no doubt on cosmological distance measurements because it is consistently accurate for god knows how long, then why not trust it. (with that open mindedness though)
https://en.wikipedia.org/wiki/Expan..._and_how_does_the_rate_of_expansion_change.3F
♪alt13
Well-Known Member
^From the article you linked to.
I'm not at all confident that I am right, just not entirely convinced.