Bright sphere at an angle of 100 degrees in the sky and followed the curve of the earth downward very rapidly - large and bright

From the back of the field where i was standing with my dog observing the constellations orion, aries and taurus (we remained facing this direction) farther to my right and at estimated 100 degree angle from me (not directly above my head) a large white sphere moved rapidly downward falling the curve of the earth, it moved in one continous path without jerking or veering. It had no sound or tail/trail of light. It was significantly larger than any comet, satellite or shooting star I had ever observed and significantly brighter. It reached a point behind the nearby trees and I could no longer see it. When it was visible its light was similar in size and brightness of a streetlamp except it was perfectly round and a white light with a very subtle halo of light around it. In the sky were 4 planes, several planets and many visible stars, all incredibly small in comparison to the U.F.O and in comparison from their distance to me. No other witnesses were with me but I could hear local children out and normal small town commotion with no noticeably strange sounds. Finally I will say that its movement through the sky was strange it moved very rapidly and smoothly with no resistance - in comparison to the planes in the sky it wad incredibly fast.