# Gravity inversion for four bodies

**URL:** <https://simpeg.discourse.group/t/gravity-inversion-for-four-bodies/682>\
**Category:** Potential Fields\
**Created:** [March 25, 2025, 8:01am UTC](https://simpeg.discourse.group/t/gravity-inversion-for-four-bodies/682 "2025-03-25T08:01:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Anish](https://avatars.discourse-cdn.com/v4/letter/a/3bc359/32.png) [@Anish](https://simpeg.discourse.group/u/Anish)\
**Post date:** [March 25, 2025, 8:01am UTC](https://simpeg.discourse.group/t/gravity-inversion-for-four-bodies/682/1 "2025-03-25T08:01:49Z")

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Hi everyone, I have a question regarding the gravity inversion, as in the tutorial it is used with two bodies, one block, and one sphere, but I am using the four bodies with two spheres and two blocks.  
I performed the forward model but was unable to recover all the bodies in inversion. I don’t know where I made the mistake. Please provide me the direction.

thank you