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Is everyone ignoring this riddle because it is to easy?
My first thought would be a binary. Though I feel like the answer may be simpler than that.
Bert Pablo,
Staff Astronomer, AAVSO
It is very simple and perception does come into play.
Hi,
For example, a planet moving directly (eastwards) among the stars, while the diurnal motion takes it westwards.
John
OMG John, you are on the right track and so very close!
I think that you know the anwser. You should just go ahead and say it.
Hi,
How about the Sun.
John