Green firball in sky, brighter than any star, li up, appeared then fell staight down behind trees, remained same color and brightnessGreen fireball light appeared in sky above tree line. Was in the southern sky, tward San antonio, from my home. Brighter than any star or planet. Looked very close. Fell staight down and disappeared behind trees. Lit up, appeared, fell and disappeared behind trees. Stayed the same brightness and color for the duration.