the.com/twinkle
starlight stuttering through the atmosphere, a cosmic flicker that means the air is the one moving.
why it twinklesturbulent air bends incoming starlight constantly
planets don'tcloser disks resist atmospheric flicker, shining steady
space viewastronauts see zero twinkle above the atmosphere
word originold english twinclian, to wink or blink
scientific nameastronomers call it stellar scintillation