From dc75160b6852b5bb868e42cb309f920979e1c522 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 21 Jan 2026 23:44:11 +0000
Subject: [PATCH 1/2] Initial plan


From 7533344dfaa6e57df4deff715314020e42a7b984 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 21 Jan 2026 23:47:31 +0000
Subject: [PATCH 2/2] Add Motivation section to EXP-units README

Co-authored-by: The9Cat <25960766+The9Cat@users.noreply.github.com>
---
 EXP-units/README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/EXP-units/README.md b/EXP-units/README.md
index e2ed5cb..658e264 100644
--- a/EXP-units/README.md
+++ b/EXP-units/README.md
@@ -1,5 +1,9 @@
 # Example unit conversion files (Earth–Sun)
 
+## Motivation
+
+Many N-body simulation codes, including EXP, work most efficiently when the gravitational constant G is set to 1 in the simulation units. This directory provides tools and examples for converting physical data (e.g., in CGS or astronomical units) to a scaled unit system where G=1, which simplifies equations of motion and improves numerical stability.
+
 ## This directory contains:
 
 | File | Contents |