I was curious if dark energy will one day tear everything apart in the universe. Since dark matter is what keeps everything in the universe in place and not scientist have found out that the acceleration of the universe is caused by dark energy, so basically one day it will overcome the dark...
hmmm ok so how do they know that when critical density is 1 the universe is flat, why would this happen? Why couldn't critical density be like below 1 or above 1 to be flat? Are these all guesses? I know about the triangle adding to 180 which proves the universe is flat but as you inflate the...
I've been confused for a very long time of how they measure and get like for example Ωmatter = 0.3 and Ωdark energy to be 0.7. I don't know how they came up with these numbers. Before they knew anything about dark energy why did they think Ω matter was 0.3 and not 0.4 or 0.5. I've been...
I was wondering how can the redshift tell you the size of the universe when there is a cosmological horizon where scientist can't see since light hasn't traveled here yet.
I'm kinda confused about how standard candle works. I know they use type 1 supernovae since their luminosity is the same everywhere but how do scientists know how far a star is if their luminosity is the same everywhere. I don't really get how they measure distance with it. Can someone please...
hmmm ok maybe I wasn't clear of what I was trying to ask. I want to know how it relates to the inflation of the universe and the how the horizon is being affected during this major expansion. I don't want any calculation I just want to know the concept, but thanks for the Hubble constant...
Ok I'm kinda confused of what is the relationship between hubble's constant, hubble's horizon length and how all those calculation works. I'm reading a textbook called quarks, leptons and the big bang but they don't explain it clearly, maybe I'm just slow but could anyone explain to me thnx!
I have a question about inflation. I read that during inflation the speed which is expanding is greater than the speed of light, is that even possible? We know that nothing in the universe is faster than the speed of light.
Well I did the lifetime = (energy) / (rate [energy/time] at which sun emits energy) which I got 8.55x10^14 which is a really really big number, that number is bigger than a trillion lol.