Two separate red lights, bright red center, like orbs, flew over back yard trees, slowly with no sound.

Sitting on back porch with friends, I saw a red circular light coming toward us overhead and crossed over us.  There were several trees and I noticed it thought the branches.  It caught my eye b/c it was very unusual, in color (bright red center w/lighter red ring around; not blinking; no white or green like a plane/chopper), distance (close enought to make some noise), speed, with absolutely no sound.  
In all my years I have never seen anything like it.
It came across a small clearing before going over the house.  
There should have been some sound, but none.  About 30 seconds later a second one came over almost the same path, but higher up (light was smaller), still no sound.  
The second one my wife noticed as it went over the house and she doesn't "believe" at all :( and she even thought it was unusual and did a double take.