From Lowell Observatory to Kitt Peak to Mount Graham, here are the 11 best planetariums and observatories in Arizona and ...

In order to find the ancient Three Leaps of the Gazelle asterism you must first locate the Big Dipper, which is high in the ...

(Why is the sky blue? Learn about it with your kids.) The aurora borealis lights up the night sky behind Iceland's iconic Kirkjufell volcano. Auroras are caused when charged particles from the sun ...