docs: fix up documentation

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/architecture.md b/docs/architecture.md
index 4eb4153..5762dfd 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -169,7 +169,7 @@ The editor and the simulation are the same world, not two separate scenes. The
 constant `SCENE_UNITS_PER_RS = 3.0` connects them: three editor grid units equal
 one Schwarzschild radius. `SceneRenderer` draws the black-hole marker's horizon at
 that radius, and `BlackHoleRenderer` takes every placed `SceneObject`, multiplies
-its position and radius by $\text{SagA\_rs}/3$ to reach physical metres, and uploads
+its position and radius by $r_s/3$ (the code's `SagA_rs / 3`) to reach physical metres, and uploads
 them into the shader's `Objects` uniform (up to 16 spheres).
 
 So a sphere placed on the Scene tab shows up in the same spot on the Simulation