Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

When gravity meets gravity

  1. Apr 8, 2015 #1
    Spacetime_curvature.png

    According to what I understand about gravity in general relativity, is that it's a space time curvature (like the picture above).

    I'm just a little curious. Let's say if there are two bodies with gravity with same mass, (assume two planets in 2D view)

    FEuvUvB.png

    That (above) would be what the curvature look like when they're far enough.

    But when they're about to collide into each other, what would happen to the curvature ?

    rVGLoIL.png

    Would they form a constructive curve ? (Therefore increasing it's gravitational force isn't it ?)

    Or

    V1sQJT6.png

    Would they still collide but maintain both it's curvature ?

    Thanks in advance.

    *I wouldn't say I know much about general relativity
     
  2. jcsd
  3. Apr 8, 2015 #2

    Orodruin

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Yes, it is space-time curvature but no, it is not like the picture, which only shows spatial curvature.

    Einstein's equations are non-linear so yes, gravitation does not simply add up as a superposition. However, in most cases you will encounter, only the linear terms are relevant.
     
  4. Apr 8, 2015 #3
    Thank you so much. Just the answer I needed.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: When gravity meets gravity
  1. When will they meet? (Replies: 15)

Loading...