What planet would it be on?
Actually, the gravity of this realm is so god damn low that it would be on an asteroid.
Assumptions:
-Dr. Terrible is a real human with average height
-Ninja stars are thrown logically, like from the waist
Neglictions:
-Air friction, typically very small in calculation anyway
-Spinning, cannot directly be determined due to lack of stats.
So if a ninja star was thrown like a plate from the waist, and traveled a leveled distance, the gravity of where the fuck ROTMG takes place has a gravitational acceleration of 0.4425, nearly 1/20 of earth’s. If the realm were a planet, it would be slightly larger than Charon, Plutos’s moon.
My messy ass work:
Back ground: I was initially going to calculate how much force it takes a ninja to throw its star, but then I remembered that there was a set speed for projectiles.
WILL EDIT IF SOMEONE GIVES ME NUMBER OF TIMES A NINJA STAR ROTATES DURING ITS FLIGHT