In Sun-Earth system, the Sun, the Earth and the Lagrange point L4 form:

In the Sun-Earth system, the Lagrange points L4 and L5 are known as the triangular or equilateral points. Specifically, L4 is located 60 degrees ahead of the Earth in its orbit, while L5 is 60 degrees behind. These points form the vertices of two equilateral triangles with the Sun and the Earth as the other two vertices. The side length of these triangles is equal to the distance between the Sun and the Earth, approximately 1 AU. Unlike the collinear points L1, L2, and L3, which lie on a straight line passing through the two large bodies, L4 and L5 are stable equilibrium points where gravitational and centrifugal forces balance, allowing objects like Trojan asteroids to remain there naturally.