At approximately 9:30pm on april 18, 2018 my wife and i were getting home from a walk with our son when i noticed the planet venus shinning brightly in the western sky... i observed venus and the moon for a bit and then i began looking east...I noticed a commercial airliner at around 30,000 feet traveling in a north-west trajectory and following behind the plane was a non-blinking orb that resembled a dim star...The orb abruptly began to dive down and away from the plane (dropping 15,000 feet in less than 5 seconds before it faded out and disappeared)... within a few minutes we were able to observe several more orbs (of the same description) materialize, float erratically through the sky and vanish... these objects were not satellites, weather phenomena or conventional aircraft...I have observed similar objects on numerous occasions and i have been diligent in trying to resolve what i have seen with no answers explaining what they are... i stood in the yard watching the sky for about 2 more hours and in that time i observed upwards of 15 separate objects...Two of the things were actual craft at lower altitude and multiple lights...I also witnessed a strange flash to the south that repeated several times while remaining stationery in the sky (flashing 5 times at 3 second intervals)... my wife was present during most of the action and she can describe the same events... thank you for your time