if you go outside, late at night, and you're fortunate to turn off the lights and let the stars show..
just be patient. You can see a "UFO" or 3 every night.
They are tiny star-like dots that zoom across the sky.
Think about them blinking - I project "Blink Blink!" and i can then see them 'rev up' their lightbulb and then it dims back out.
i live near an intl airport so i know the diff between planes and not-planes.
also very familiar with ghettobirds and such.
these dots are higher than planes fly - and move faster. they don't "flash" like planes, but they will blink back at you.