posted on Oct, 3 2008 @ 12:12 AM
As a chronic star watcher I have some experience in this phenomenon, next time you are star gazing, observe a bright star close to the horizon, it
will be twinkling, now observe a star of similar brightness straight above you, it should be noticeable more stable in it'd brightness, this effect
is caused by the increased atmospheric density when looking at objects far away that are very low in the sky. If you wait several hours and reacquire
the star when it is higher in the sky, you will see that the twinkling is much reduced. Some very bright stars put on an amazing show as they first
become visible, I know they are stars but sometimes I have to watch them over a extended period of time to reassure myself that it is indeed just a
star. The amount of wavering and color changing can be more that you might expect, sometimes you will see them changing through the full spectrum of
possible colors, like a color changing strobe light, but if it is just a star the effect will diminish as it slowly rises into the night sky.