I don’t understand it tbh. How can space expand, but not expand in volume, it’s so mind boggling lol
I wonder if this confusion has to do with the fact that space expands faster than the speed of light. Which is also hard to comprehend lol…
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some of ya’ll might find this interesting. I’m not a fan of Jordan Peterson, can’t even follow what he’s talking about most of the time, but Donald Hoffman have some interesting ideas about reality. As I understand it it’s kind of “the map is not the territory” kind of thinking, that reality might be entirely different than how we perceive it. Something I’ve thought about myself before also. It seems completely possible to me that reality isn’t even what we can measure in quantum physics. What we can measure and observe in quantum physics is maybe a bit like interacting with a computer interface. You send an email, but the thing that actually writes and sends the email are the hardware inside the computer, not the “send mail” button, or you typing text on the screen. And that hardware is something entirely else than what is happening on the screen. So our perception of reality might be like a computer interface, while reality is the computer hardware and the ones and zeroes etc etc. I love this idea.
edit: I have to correct, it’s not even “the map is not the territory” because in this theory reality is something completely different, and a map having similarities to the actual land we can see, then the computer interface/computer hardware would be a better analogy.
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You know travelling across the biggest black hole phoenix* takes weeks even if we travel at the speed of light.
Another fact universe is 13.8 billion years old but the visible universe is like 90 odd billion light years which means due to expansion at more than speed of light we could observe that though big bang happened 13.8 billion years back. The shift in objects in space over time is rapid.
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Today I will read some more physics watch this space, physics enthusiasts.
Today we will be looking at my physics made easy book. Yay. 
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Do you know anything about the Anthropic Principle?
Anthropic Principle :
https://pages.uoregon.edu/jschombe/cosmo/lectures/lec24.html:
The success of science in understanding the macroscopic, microscopic and cosmological worlds has led to the strong belief that it is possible to form a fully scientific explanation of any feature of the Universe. However, in the past 20 years our understanding of physics and biology has noted a peculiar specialness to our Universe, a specialness with regard to the existence of intelligent life. This sends up warning signs from the Copernican Principle, the idea that no scientific theory should invoke a special place or aspect to humans.
To understand this “specialness”, consider that all the laws of Nature have particular constants associated with them, the gravitational constant, the speed of light, the electric charge, the mass of the electron, Planck’s constant from quantum mechanics. Some are derived from physical laws (the speed of light, for example, comes from Maxwell’s equations). However, for most, their values are arbitrary. The laws would still operate if the constants had different values, although the resulting interactions would be radically different.
Examples:
- gravitational constant: Determines strength of gravity. If lower than stars would have insufficient pressure to overcome Coulomb barrier to start thermonuclear fusion (i.e. stars would not shine). If higher, stars burn too fast, use up fuel before life has a chance to evolve.
- strong force coupling constant: Holds particles together in nucleus of atom. If weaker than multi-proton particles would not hold together, hydrogen would be the only element in the Universe. If stronger, all elements lighter than iron would be rare. Also radioactive decay would be less, which heats core of Earth.
- electromagnetic coupling constant: Determines strength of electromagnetic force that couples electrons to nucleus. If less, than no electrons held in orbit. If stronger, electrons will not bond with other atoms. Either way, no molecules.
All the above constants are critical to the formation of the basic building blocks of life. And, the range of possible values for these constants (and still result in complex molecules) is very narrow, only about 1 to 5% for the combination of constants. Outside this range and lifeforms (in particular, intelligent life) would be impossible.
It is therefore possible to imagine whole different kinds of universes with different constants, all equal valid within the laws of Nature. For example, a universe with a lower gravitational constant would have a weaker force of gravity, where stars and planets might not form. Or a universe with a high strong force which would inhibit thermonuclear fusion, which would make the luminosity of stars be much lower, a darker universe, and life would have to evolve without sunlight. Why don’t those Universes exist? Why does our Universe, with its special value exist rather than another? Is there something fundamental to our physics that makes the present values for physical constants expected?
All these conditions basically ask three questions 1) why is there any structure at all to the Universe, 2) why does this structure lead to the capability for life to exist, and 3) why does life lead to intelligence to understand this structure?.
This dilemma of the extremely narrow range of values for physical constants that leads to the evolution of conscious creatures, such as ourselves, is called the fine-tuned Universe or the anthropic principle,
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Why does this appeal to me so much?
I feel like it’s trying to tell me something with regards to my declined physical health.
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Maybe it’s telling me that so much energy has gone into fine tuning the universe so immensely precisely, for us, over time, I guess, and we are able to observe that, that I should feel that the universe wants me to be healthy because so much energy has gone into fine tuning it for life and for us to be able to acknowledge that too… It’s just a belief
What do you guys feel once reading that above article?
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Sounds interesting. Yes I remember from astronomy or at least some articles from back then, them saying that it’s possible that the laws of physics could be different in different parts of the universe. It’s interesting. We assume they are the same everywhere but could be varrying I suppose.
This universe is very complex and vast to say the least. To me this speaks of the immense power of the creator.
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Thankyou for sharing that with us. 
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Yes there could be a mutiverse for example.
And I think in black holes the science is a bit strangely twisted idk
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Yep very well could be 
Thanks for creating this thread btw I find physics really interesting as well. I haven’t looked into it much tho
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You’re welcome, I’m glad you like it and I enjoy listening to your opinions or interests in physics if you ever are in the mood again. Basic and simple is also great. I like that. 
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I came across something in my studies. Apparently a part of quantum mechanics only works for the smallest of atoms and not beyond, I’ll have to look again but i found that interesting.
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Interesting that is :))
I was reading that 5 prcnt of the universe is matter and the rest is dark mTter and dark energy and we don’t even know wat the dark components do I think they have no gravity??
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Yeah gravity is super interesting, in einstein field equation they assume the universe has dark energy/dark matter which balances the gravity - something like that, it’s super fascinating stuff - gravity is kinda the goal for me, i wanna understand more for sure
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You don’t have to explain it but just wondering, do u understand special relativity
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not mathematically, but as a concept I understand a little. it goes something like, time is different depending on where the time is measured eg, inside an atom is different to the electrons sense of time (electron being the outside of the atom)
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Oh OK cool. I personally find the concept hard to grasp. Maybe I’m reading the wrong articles
Will need to check out my physics for dummies type book, lol
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