There have been multiple accounts created with the sole purpose of posting advertisement posts or replies containing unsolicited advertising.

Accounts which solely post advertisements, or persistently post them may be terminated.

How do we know the universe outside our solar system truly exists?

This is something that has been bothering me for a while as I’m diving through space articles, documentaries etc. All seem to take our observations for granted, which are based on the data of the entire observable universe (light, waves, radiation…) we receive at our, in comparison, tiny speck. How do we know we are interpreting all this correctly with just the research we’ve done in our own solar system and we’re not completely wrong about everything outside of it?

This never seems to be addressed so maybe I’m having a fundamental flaw in my thought process.

cabron_offsets ,

Bruh. We can see it. We can also “see” wavelengths not visible to the human eye with radiotelescopes n shit.

You can see Andromeda, a whole-ass different galaxy, with your naked eye.

skillissuer ,
@skillissuer@discuss.tchncs.de avatar

In some fundamental way we don’t really know, all you can do is to make a model and then test it as extensively as we can. Then, try to break it and improve it, making it more precise, more general etc. However several things makes that guessing easier

One thing is cosmological principle, ie assumption that laws of physics are basically the same everywhere. One argument that makes this assuption hold better is Noether’s theorem en.m.wikipedia.org/wiki/Noether's_theorem which means that at least some conservation laws are pretty fundamental. We don’t really know if laws of physics were the same in distant past, if they were then maybe there are some other, as of yet not discovered more fundamental laws of physics that hold in both conditions and simplify to what we know today in current conditions

Krudler , (edited )

How do you know the bird in the tree over there is real?

Well you can see it, photons have been emitted from the bird, which are captured by your eyes.

This is fundamentally identical to how we detect objects in deep space, we capture the photons, the neutrinos, the gamma rays, gravitational waves, whatever energetic emission is coming from them, and that’s how we know they exist.

E

  • All
  • Subscribed
  • Moderated
  • Favorites
  • •
  • [email protected]
  • random
  • lifeLocal
  • goranko
  • All magazines
    •