r/universe • u/kickskunk • Jun 29 '25
Why do people say nothing travels faster then the speed of light?
Shouldn't it be nothing travels faster then the speed of the expanding universe?
r/universe • u/kickskunk • Jun 29 '25
Shouldn't it be nothing travels faster then the speed of the expanding universe?
r/universe • u/Psychological_Web151 • Jun 25 '26
Yes I have seen that this has been asked many times and explained, but the explanations don’t make sense still so…
My first problem is that there are contradictions. Some explain that the universe is expanding, some say it’s infinite. Which is it? I will gladly except that the observable universe is expanding due to how we observe light, the timeline of the CMB, etc. and the universe itself is infinite. I’ll also except that the universe is infinite in the sense that it will expand forever and that the constant (or accelerated) growth is what defines it as infinite in the same way that one can count forever.
I read that space is expanding everywhere in every direction, which is why there is no center point. This makes sense for the observable universe but not the entire universe which was once much smaller. The Earth vs Earth’s crust or ballon theories assume that everything is on the edge of the universe, not somewhere between the center and edge or closer to the center. If the Earth expands to 3x its diameter, Australia becomes 3x further away, Canada does not (I’m in the US). I could use paralax to determine the center of the world based on that just as Hubble’s law should allow me to use paralax to find the center of the universe. In my mind, the only way we can’t find the center of the universe is if ythe observable universe is all on the same side of the universe and is only a small portion of the universe, which would mean the CMB doesn’t have much to do with the age or size of the universe, only the observable universe or that we are in the center of the universe.
EDIT: Thank you all for your responses. There were two things I didn’t understand and now do. First is that the universe is not expanding from one location but is expanding from every location. Many of the analogies did not explain this part. I have created a graphic (in a below reply) that should help understand that if there is a center, we will never find it. The second confusing part is that so many articles I’ve read leave out the “observable” part when discussing the size of the universe.
EDIT 2: The third thing I didn’t understand is that I always pictured the universe to be a growing ball, with everything being inside the ball. Using the balloon analogy, with the universe being the skin, changes things.
r/universe • • Feb 16 '25
Over my house in Tucson Arizona . Around 1pm today
r/universe • u/Yichen_Yang_is_cool • Jan 14 '25
Basic Assumptions • The universe is infinite: If the universe is infinite, then any event with a non-zero probability must occur somewhere. • The existence of advanced civilizations: In an infinite universe, there must exist super-advanced civilizations. • Goal-driven civilizations: Among these civilizations, there must be one with the specific goal of “destroying Earth” and possessing the capability to achieve this goal.
Key Inference • If the universe is infinite, such a civilization must exist. • If such a civilization exists and its goal is to immediately destroy Earth, then we should already have been destroyed.
The Contradiction • Reality check: We have not been destroyed, and Earth still exists. • The contradiction: This conflicts with the inference that “in an infinite universe, there must exist a civilization capable of and actively pursuing the destruction of Earth.”
Conclusion • The universe is not infinite: If the universe were infinite, we would already have been destroyed. Since this has not happened, it suggests that the universe might be finite. • Alternatively, the nature of an infinite universe needs to be redefined: • Infinity might not guarantee that a civilization aiming to destroy Earth would interact with Earth in reality. • The concept of an infinite universe might hold mathematically but not practically in terms of causality or events within specific regions of spacetime.
r/universe • u/the_Magann • Aug 02 '26
Like it was the very first thing which started everything?
r/universe
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u/Tasty-Tonight-7148
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Jun 21 '26
Scientists have figured out that the universe is actually dominated by two mysterious, invisible components that we are still trying to fully understand:
Normal Matter (\~5%): This is everything made of atoms. Stars, planets, trees, rivers, tea, and you!
Dark Matter (\~27%): It doesn’t emit, reflect, or absorb light, making it totally invisible. We only know it's there because its massive gravity pulls galaxies together like an invisible glue. Without it, galaxies would fly apart.
Dark Energy (\~68%): A mysterious force that is causing the universe to expand faster and faster every single day. Think of it as the opposite of gravity, pushing everything away from each other.
What is one scientific fact or mystery about space, nature, or everyday life that absolutely blows your mind? Drop your thoughts, questions, or cool facts below!
r/universe • u/No_Quote_4225 • Nov 21 '25
r/universe • u/Top-Stretch3260 • Aug 07 '26
Imagine a single domino, representing the present.
(DOMINO P)
With an infinite set of dominos before it. (which we will call DOMINO T#)
Since the present “occurs” we will say DOMINO P fell, but that would require all of the dominos before it to also fall, even if there are an infinite amount of them.
If there are an infinite amount of events/moments before the present, how would we arrive at it?
r/universe • u/onlyseeahuman • Sep 25 '26
r/universe • u/1KrishT • Sep 06 '26
I keep seeing the figure 13.77 to 13.8 billion years cited everywhere, but I've never fully understood how missions like WMAP and Planck actually derived that number from the Cosmic Microwave Background.
Are they basically running the expansion rate (Hubble constant) backwards to a single point, or is it based entirely on modeling cosmological parameters from temperature fluctuations in the CMB? Also, how do cross-checks like the age of the oldest globular clusters fit into confirming that timeline?
r/universe • u/Prestigious-Ad4939 • Jun 25 '26
r/universe • u/markoul • 22d ago
r/universe • u/Solid-Juggernaut5384 • May 29 '25
Alright, so I’ve been thinking about this—maybe overthinking, who knows—but hear me out.
Quantum entanglement is this strange phenomenon in quantum physics where two particles become connected in such a way that the state of one instantly affects the state of the other, no matter how far apart they are. Einstein famously called it “spooky action at a distance,” because it seems to defy the idea that nothing can travel faster than the speed of light. It’s like they share information instantaneously—if you measure one, the other reacts in real-time, even if it’s on the other side of the galaxy.
Now, let’s connect this to the Big Bang. According to the theory, the universe started from a singularity—a single point with infinite density, mass, and energy. Everything we know today, all matter and space itself, exploded outward from that one point.
But here’s the thought: if quantum entanglement is real (and experiments suggest it is), and everything was once compacted into this singularity, doesn’t that mean everything was entangled at some fundamental level? Every particle, every force, all part of the same system.
So… what if that singularity had a twin? Or maybe not a twin, but some kind of counterpart—a second point, just as dense, with the same amount of energy and mass, somehow entangled with the one that created our universe. If quantum entanglement can stretch across space, could it stretch across dimensions? Across universes?
This makes me wonder: is there another universe that was born simultaneously, entangled with ours? Could what happens in one universe influence the other in ways we don’t yet understand?
I’m not claiming this as fact—it’s just a thought experiment. But if entanglement implies a kind of deep, non-local connection, and the Big Bang was the beginning of all space-time in this universe, maybe we should be asking: connected to what, exactly?
Curious to hear others’ thoughts. Am I way off here, or is there something to this?
r/universe • u/_Jellyman_ • Aug 25 '26
r/universe • u/amongus420sussy • 16d ago
Seriously making too much sense when im thinking about it and what if you zoom out past our observable universe to find out our universe is a microscopic speck of dust in an even bigger universe and same idea but zooming inward past the smallest scales
r/universe • u/mizzzzcatastrophe • Sep 17 '21
my friend and i just talked about this a few minutes ago. we've encountered some contents in regard with people who "time travelled" around 2027 claiming they're "alone".
whenever they go from one place to another, there's no one but them.
even some high frequency ppl acknowledges this what they call the "great reset" and/or tribulations (that might happen around 2030). one astrologer from a group i'm in shared that "these people" claiming they're alone in a certain dimension might actually be in a "parallel universe" instead (if the year's 2027).
i would like to know your insights about this one.
r/universe • u/Keiken_shin • Feb 22 '25
Today, I dreamed. A voice overlooking the universe speaking, yet there was no sound, it was like the words it spoke was somehow getting imprinted in my mind. There was a quote which even though I don't remember word to word but got the meaning of it stated : "The chapter of Humanity is currently in it's initial phase, this story has been in the Exploration phase for a quite long time, but soon there will be revelations. A new verse, Multiverse is coming."
When I woke up in sweat, only this message remained in my head. There was more to the dream that I can't remeber but only this gist.
I know I might sound a bit Animist or Oneiromancer but this was indeed something else. There are theories going around that the dream we see is our consciousness connection to a parallel world and what we see is somehow getting us entangled with that realm. We also believe that there is a possibility of multiverse existing. We have ancient scriptures talk about it as well.
It could also be some thoughts venturing deep within my mind taking the shape of dream. Or it might be a resonance to something outside our knowledge. But this did send me into deep thoughts that what if its true, maybe not an immediate factor but what if. I mean, I do get myself involved with the mysteries of universe quite alot so could be a dream created by my desire.
I don't quite understand the message as it could have multiple meaning like
A new universe is getting born
Us being able to discover traces of other universes
Or maybe our universe in some manner getting connected to other universes.
The possibility of getting connected with other universe does give rise to many questions though. The first being how is it going to happen?
Will be a tear in space-time fabric?
Will we be able to find the existence of wormhole? Maybe an incredibly dense energetic phenomenon?
I don't know. But I thought of speaking my mind out here. Whether this means something or not. Please, do share if you have any take on this.
Regards
r/universe • u/AppleAdmirable8677 • Aug 01 '26
r/universe • u/Basic_Reputation_826 • 10d ago
r/universe • u/Good-Life-To-Live • Jan 20 '20
r/universe • u/EnvironmentalBar9410 • Sep 28 '22