The Space Megathread - theories and discussion

[Khaz]

As requested by:

Myself,

count me in

I am interested in your spacey ideas :o

o/

hi yos

Space discussion thread pls

Discuss all things space you come across. Since this is new I will probably add major theories to the OP and an index of discussion depending on how big the thread even gets.

To infinity and beyond!

Let's discuss the nature of gravity and why individual bodies are typically spherical but clusters of objects are disklike.

[Ad Bot]

[Blockomaniac]

no i wanna talk about how black holes can make time travel possible, and how is space is infinite

[Verification]

clusters of objects are disklike because something is preventing them from forming together
jupiter"s rings dont form into something because of jupiter's moons
the kuiper and asteroid belt are too far from eachother and are stuck between things so they are forced to be belts
asterioid belt because of mars and jupiter and the kuiper belt because of neptune and they're way too far apart and slow orbiting for major collisions to happen

[Khaz]

no i wanna talk about how black holes can make time travel possible, and how is space is infinite

owo interstellar huh huh

well you see time is a relatively subjective concept only pertaining to humankind. nature and existence as a whole don't really care about time it just does its thing because that's what it needs to do. what is time? are there other forms of time? we know it's infinite and continuous, but does it infinitely extend backwards too? we can only see history through capturing light. if we look up to the sky through a telescope and see something that's 1000 light-years away, we are seeing it as it was 1000 years ago because it takes 1000 years for it's light to reach us. light seems to be essential to understanding and recording time that happened in the past. as far as i know we dont need light to understand time in the future. there is no way to understand the future. it happens and it will happen because time is infinite.

with that being said, light cant escape black holes so if we somehow use black holes for time travel, would it even be possible to go back in time? how would time travel to the future work? is spacetime so forgeted within a blackhole that time simply just doesnt exist and it just stops? there are so many questions

[Steve5451²]

hell yeah

no i wanna talk about how black holes can make time travel possible, and how is space is infinite

owo interstellar huh huh

well you see time is a relatively subjective concept only pertaining to humankind. nature and existence as a whole don't really care about time it just does its thing because that's what it needs to do. what is time? are there other forms of time? we know it's infinite and continuous, but does it infinitely extend backwards too? we can only see history through capturing light. if we look up to the sky through a telescope and see something that's 1000 light-years away, we are seeing it as it was 1000 years ago because it takes 1000 years for it's light to reach us. light seems to be essential to understanding and recording time that happened in the past. as far as i know we dont need light to understand time in the future. there is no way to understand the future. it happens and it will happen because time is infinite.

with that being said, light cant escape black holes so if we somehow use black holes for time travel, would it even be possible to go back in time? how would time travel to the future work? is spacetime so forgeted within a blackhole that time simply just doesnt exist and it just stops? there are so many questions

time slows down as your speed increases so as you accelerate towards the black hole the world around you is moving faster while seeming the same for you. It's more of a fast forward than time travel, and you'd just end up getting ripped apart by the black hole anyway.

you could possibly orbit the black hole to fast forward time but i don't know how strong this effect would be. orbits around earth for months only seem to be a millisecond behind.

at least that's the way i understand it. i'm sure somebody's more knowledgeable in this field.

[Nix the Glaceon]

mars doesnt like landers

[otto-san]

space is big and it is empty. If u go there you might be lonely! as humans aren't in there!

[Steve5451²]

space is big and it is empty. If u go there you might be lonely! as humans aren't in there!

but it's packed full of all sorts of fun things like cosmic radiation and photons!!

[Khaz]

hell yeah

time slows down as your speed increases so as you accelerate towards the black hole the world around you is moving faster while seeming the same for you.

It does? I would think that it just means you individually are moving faster than things around you rather than everything else

[The Resonte!]

to go at the speed of light to an observer you'd have to go at infinite speed

you'd get to your destination instantaneously, but as if you also warped several decades into the future

[Khaz]

also something interesting i learned from Vsauce yesterday

did you know

at 1/1000th of a light-year away our sun would look like a regular star in the sky

at 90 light-years away our sun would disappear because our sun is pretty small compared to most stars.

BUT, almost all of the stars we see in our night sky are 90+ light-years away. meaning all of those stars that we see and marvel at at night.... if there were to be life in any of those systems... they cant see us back

heres the video. we're lonelier than we think

[Steve5451²]

It does? I would think that it just means you individually are moving faster than things around you rather than everything else

https://en.wikipedia.org/wiki/Time_dilation

this gif p much sums it up


from the blue clock's perspective the red clock is moving slower, but from the red clock's perspective the blue clock is moving faster.

[Khaz]

https://en.wikipedia.org/wiki/Time_dilation

this gif p much sums it up


from the blue clock's perspective the red clock is moving slower, but from the red clock's perspective the blue clock is moving faster.

thats pretty weird how that works

also those equations are gnarly

[IkeTheGeneric]

FTL travel would be interesting, because everyone planet or station bound will experience time differently from you, it would make any meaningful interaction between ship and colony difficult.

[Khaz]

FTL travel would be interesting

ive always questioned FTL travel

the way it works in cinema/games is pretty straightforward and simple but im afraid it isnt as simple as that

also what do you guys think dark matter is? we know it exists but we just dont know what it is or what its made of.