If you want to learn about the world beyond terra firma, these are the two books to read: An Ocean of Air by Gabrielle Walker and Death by Black Hole by Neil de Grasse Tyson. Both are well-written and geared to the lay person readers. I now understand -- in the most simplistic of terms (smile) -- the skies beyond terrestial earth -- from earth's atmosphere to the farthest reaches of the universe.
Did you know?
Because of the broiling activity taking place in the sun, it takes 1,000,000 years for a photon to travel from the center of the sun and finally leave the sun. If that same photon were able to travel without interference, that journey would take 2-3 seconds.
All the water in the oceans can be accounted for by the water added by comets (those icy snowballs from the outer solar system) hitting the earth for the past 4.5 billion. That puts into perspective how long a billion years really is.
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