MOXPEARL25
MOXPEARL25 t1_ja48rnj wrote
Reply to Eli5 Help, please my brain hurts. If there is an expanding ring of light from the big bang, what is outside it? by ExtremeQuality1682
The Big Bang is often described as an explosion, but it's important to note that it's not an explosion that occurred in space; rather, it's an explosion of space itself. This means that the Big Bang did not occur at a particular point in space, but rather, it created space itself.
When we talk about an expanding ring of light from the Big Bang, we are referring to the cosmic microwave background radiation (CMB), which is the leftover radiation from the Big Bang. The CMB is often depicted as a "ring" because it is the furthest we can currently observe in the universe, and it is at the "edge" of the observable universe.
As for what is outside the CMB, the truth is that we don't know for sure. It's possible that the universe is infinite, and there is simply more universe beyond what we can observe. It's also possible that the universe is finite and bounded, in which case there may be some sort of boundary beyond the CMB. However, the nature of this boundary, if it exists, is currently unknown.
It's important to keep in mind that when we talk about the universe, we are talking about everything that exists, including space and time. So if there is something "outside" the universe, it is by definition not part of the universe. Therefore, the question of what is outside the universe may not be a meaningful question at all.
MOXPEARL25 t1_ja4884e wrote
Reply to comment by KA-ME-HA-ME- in ELI5 Why do doctors wait for cancer to progress to a further stage before prescribing certain treatments like immunotherapy? by JustMe182
I was literally trying to think of a metaphor like this lmao
MOXPEARL25 t1_ja46n14 wrote
Reply to ELI5 Why does getting hit in the nose have such a weird and different feeling from getting hit anywhere else? by dandizzles
Getting hit in the nose has a different feeling from getting hit anywhere else because the nose is a particularly sensitive part of the body. The nose is full of nerve endings, meaning that it is very sensitive to touch and pressure. Additionally, the nose has a direct connection to the brain, so any sensation of pain or pressure that is felt in the nose can be felt more prominently.
Furthermore, the nose is home to a number of delicate and important internal structures, such as the sinuses and nasal cavity, which can be damaged easily by a hard blow.
MOXPEARL25 t1_ja4ax3e wrote
Reply to comment by ExtremeQuality1682 in Eli5 Help, please my brain hurts. If there is an expanding ring of light from the big bang, what is outside it? by ExtremeQuality1682
While it is true that some parts of the universe are currently beyond our observable horizon, this does not necessarily mean that there are dark galaxies that we cannot see. Our ability to observe objects in the universe is limited by the speed of light, which is the fastest anything can travel. The farthest objects we can currently see are the ones whose light has had enough time to reach us since the beginning of the universe.
However, it is possible that there are areas of the universe where light has not yet reached us, and we cannot observe them yet. These regions are commonly referred to as the "unobservable universe." However, it is important to note that this is not the same as a "dark galaxy," which refers to a galaxy that emits very little or no visible light. Dark galaxies are still detectable through other means, such as their gravitational effects on surrounding matter.
Overall, our understanding of the universe is continually evolving, and there is still much we do not know.
So in a nutshell: We can only physically SEE so far. But by other means of measure we can detect certain energies further out into the universe. This one’s we can detect but can’t see are the “dark galaxies”. They still exist but are too far for us too see. And outside that is really unknowable.