u/Fordius25

"If you had a Planck length on one side, and the observable universe (93 billion light years) on the other side, and you were asked to pick the half way point, you'd be shocked to find out that it's the width of a human hair.

A piece of hair is as tiny to the observable universe as a Planck length is to a piece of hair."

Saw this on a YT comment about sizes. Still trying to wrap my head around it, even though I've seen iterations of this before.

Betelgeuse may well have gone supernova already in live time and we're waiting on the light and I do think the very distant early galaxies surely must look a lot more different to how we can see them now, maybe as full fledged galaxies or smth else?

Usually draws are crap but this one seems not half bad bc you do get a guaranteed tank. Thoughts?

Also what new things would we be able to observe as our position in the Milky Way changes?

As we know the light we receive from earth has traveled a long way for some objects (think Gn-z11 or MoM-z14). If a viewer started traveling towards the object, how would their view of the object changed as they got closer and closer? Some very distant (and early) astronomical objects are definitely not in the state that we see them today so how does the view transform between what we began with and what we should see presently?

Ist es 3 Stunden bevor meinem Flug am BER genug?

Month away but still so much of it feels overwhelming.

WACC, all the hedging calcs, not to mention the theories.

When i try the problems it feels too much for me to process.

Does their tools allow for some confirmation of the Oort Cloud's existence if it was placed at where the cloud supposedly starts. Obv this is a hypothetical but I want to know would Voyager be able to send us any useful data confirming the existence of the Oort Cloud?

If someone was departing from the Milky Way to say Andromeda, what is meant when people say it would be pitch black all around? I'd have thought traversing between galaxies would have some glimmers here and there of stars and galaxies (i.e. Andromeda), however faint they are, that would still be visible.

I find it a bit hard to process given we're able to see Andromeda from earth (with good vision/visibility) from a 2mly distance so any clarification helps!