When Imagination Fails

Science fiction has long been looked to as a source of prophecy...but why? Perhaps because, out of necessity, its futures work: spaceships fly and inventions are successful because they need to be—there'd be no story without them. And because more often than not (to paraphrase Jules Verne) whatever one man can imagine… » 1/15/15 11:16am 1/15/15 11:16am

I'm not too sure what your question means. If you are asking if the amount of light reflecting from a planet depends on its size and the nature of its surface, you are right. Venus, for instance, would be a very bright object, much brighter than a full moon, while Mercury, which is smaller and has a very dark surface,… » 1/02/15 5:38am 1/02/15 5:38am

I have to agree with Zembar. It's a very, very beautiful model of the moon, but it's still just the moon. The only thing that set the Supermoon apart was that it was slightly closer to the earth than usual—-a quality impossible to make intrinsic to a model (just hold it closer). I understand that the model is… » 11/21/14 3:16am 11/21/14 3:16am

I just completed a cover and interior spread for Astronomy depicting the upcoming flyby of Pluto, and a cover and two spreads for Scientific American about superhabitable planets. My latest book, The Art of Space, came out last week and I'm gearing up for the next book project: a popular history of spaceships. It will… » 11/04/14 8:41am 11/04/14 8:41am