4 ms·

https://web.archive.org/web/20140701085917/http://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html https://web.archive.org/web/20140701085917/ht

https://web.archive.org/web/20140701085917/http://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html https://web.archive.org/web/20140701085917/http://www.nasa.g... : > Although the galaxies will plow into each other, stars inside each galaxy are so far apart that they will not collide with other stars during the encounter. However, the stars will be thrown into different orbits around the new galactic center. Simulations show that our solar system will probably be tossed much farther from the galactic core than it is today.

raverbashing 1y ago
Very low probability times massive number of stars: yes I think there will be a non-zero number of actual collisions
- bruce511 1y ago
  You are confusing one big number with another big number, and treating them as the same. Yes there are a lot of stars. It's a big number. But there's a lot of space. That's a number that's in a whole different league. For example, the whole solar system is about 2 light-day diameter. But it's 4 light years from the nearest star in any direction. Empty space is thus many orders of magnitude more than solar systems, never mind suns. Sure there's a probability of a collision. But even multiplied by the number if stars, it's still really tiny.
  - raverbashing 1y ago
    I would agree, except for some factors: Gravity tends to bring heavy objects together Andromeda and the Milky Way are not colliding "like two pancakes on top of each other" but at an angle to each other Also star surroundings are usually places where you can collide with a lot of stuff (asteroid belts, dust, etc) We're not shooting a goal on a 4 light-year wide goalpost (btw that's the density on our vicinity, but on other areas the density is higher) but passing multiple stars on an environment that can be perturbed and heavy things attract each other
    - karn97 1y ago
      [dead]
  - aurareturn 1y ago
    [flagged]
    - consp 1y ago
      Unless it can quote the paper which says that, show it and that paper actually validates it with good math, I'll treat it as a hallucination.
    - Projectiboga 1y ago
      The collision part of the merger could be over a very long time frame. So those few dozen might be spaced over many million years.
  - MangoToupe 1y ago
    This entire conversation seems silly without a time frame. Over a long enough time with continually interacting orbits, of course mass will coalesce. I don't think "merge" means "one time interaction that fully disperses the mass", anyway. If they merge in 7 billion years, you think over the eg next 7 billion there won't be kinetic collisions? I'm skeptical.
    - karn97 1y ago
      [dead]
    - lIl-IIIl 1y ago
      If they merge in 7 billion years, I wouldn't count a collision in year 13 billion as a result of colliding galaxies. It would be just a normal behavior of stars colliding in the new galaxy that was formed.
      - MangoToupe 1y ago
        Well, you certainly should—that's how causation works.
  - metalman 1y ago
    There is no Universal Saftey Insitute where they test crash Galaxis , and we have no idea if the indivual stars in a galactic collision will line up such as there mutual gravitational atractions leads to head on collisions. Both galaxis are rotating and presumably there are sections ,unknown and unknowable, that will interact much like gears meching, where the chances of collision are much higher over time. Reducing the whole thing to a simple probability of something like two fields of dots, pushed strait through each other may not be valid, and I am absolutly cetain that no one has the compute needed to run a simulation on billions of varied gravitational singularities moving and interacting with another set......... which is of course all my lead up to do a pitch for a mega intraferametric space telescope to observe actual coliding galaxies and other phenominon, to be built sooner, rather that later. would also be good for looking at details on exo planets.....give it a realy wide focul length and it could also zoom in on asteroids and comets for research, early warning of impacts and determining potential space mining candidates. current work in space navigation is focused on providing ultra high precision data links between different satelite units in an array that will alow introfermetry to work without a physical conection between the sensors, making for larger, cheaper telescopes, that are orders of magnitude more powerfull than anything built yet
    - DiggyJohnson 1y ago
      We should all close our eyes and imagine the insanity of two stars directly colliding. My goodness.
      - pixl97 1y ago
        I mean spin down collisions are a common enough occurrence and likely happen at higher speeds. Also watching stars getting disrupted by black holes would be similar.

raverbashing 1y ago

Very low probability times massive number of stars: yes I think there will be a non-zero number of actual collisions

bruce511 1y ago
You are confusing one big number with another big number, and treating them as the same. Yes there are a lot of stars. It's a big number. But there's a lot of space. That's a number that's in a whole different league. For example, the whole solar system is about 2 light-day diameter. But it's 4 light years from the nearest star in any direction. Empty space is thus many orders of magnitude more than solar systems, never mind suns. Sure there's a probability of a collision. But even multiplied by the number if stars, it's still really tiny.
- raverbashing 1y ago
  I would agree, except for some factors: Gravity tends to bring heavy objects together Andromeda and the Milky Way are not colliding "like two pancakes on top of each other" but at an angle to each other Also star surroundings are usually places where you can collide with a lot of stuff (asteroid belts, dust, etc) We're not shooting a goal on a 4 light-year wide goalpost (btw that's the density on our vicinity, but on other areas the density is higher) but passing multiple stars on an environment that can be perturbed and heavy things attract each other
  - karn97 1y ago
    [dead]
- aurareturn 1y ago
  [flagged]
  - consp 1y ago
    Unless it can quote the paper which says that, show it and that paper actually validates it with good math, I'll treat it as a hallucination.
  - Projectiboga 1y ago
    The collision part of the merger could be over a very long time frame. So those few dozen might be spaced over many million years.
- MangoToupe 1y ago
  This entire conversation seems silly without a time frame. Over a long enough time with continually interacting orbits, of course mass will coalesce. I don't think "merge" means "one time interaction that fully disperses the mass", anyway. If they merge in 7 billion years, you think over the eg next 7 billion there won't be kinetic collisions? I'm skeptical.
  - karn97 1y ago
    [dead]
  - lIl-IIIl 1y ago
    If they merge in 7 billion years, I wouldn't count a collision in year 13 billion as a result of colliding galaxies. It would be just a normal behavior of stars colliding in the new galaxy that was formed.
    - MangoToupe 1y ago
      Well, you certainly should—that's how causation works.
- metalman 1y ago
  There is no Universal Saftey Insitute where they test crash Galaxis , and we have no idea if the indivual stars in a galactic collision will line up such as there mutual gravitational atractions leads to head on collisions. Both galaxis are rotating and presumably there are sections ,unknown and unknowable, that will interact much like gears meching, where the chances of collision are much higher over time. Reducing the whole thing to a simple probability of something like two fields of dots, pushed strait through each other may not be valid, and I am absolutly cetain that no one has the compute needed to run a simulation on billions of varied gravitational singularities moving and interacting with another set......... which is of course all my lead up to do a pitch for a mega intraferametric space telescope to observe actual coliding galaxies and other phenominon, to be built sooner, rather that later. would also be good for looking at details on exo planets.....give it a realy wide focul length and it could also zoom in on asteroids and comets for research, early warning of impacts and determining potential space mining candidates. current work in space navigation is focused on providing ultra high precision data links between different satelite units in an array that will alow introfermetry to work without a physical conection between the sensors, making for larger, cheaper telescopes, that are orders of magnitude more powerfull than anything built yet
  - DiggyJohnson 1y ago
    We should all close our eyes and imagine the insanity of two stars directly colliding. My goodness.
    - pixl97 1y ago
      I mean spin down collisions are a common enough occurrence and likely happen at higher speeds. Also watching stars getting disrupted by black holes would be similar.