The Moons, Ranked

Back in February I handed down the definitive ranking of all the planets in our Solar System. Today, I'm going to finish the job with a corresponding ranking of the Solar System's moons—rich and varied worlds in their own right, some larger than the smallest planets. This will not be an exhaustive list. Jupiter alone... Continue Reading →

Secrets of the Valles Marineris

The first and only time I ever saw the Grand Canyon was when I was eight years old, traveling through the southwestern United States on a family road trip. I knew roughly what it looked like, of course, but nothing had prepared me for the sheer scale of that thing. It was a sculpted, dizzyingly... Continue Reading →

Cradle of Humanity

A think piece for today: If you want to get a rise out of space nerds, bring up Mars colonization1. These days it's the subject of countless op-eds and heated Facebook discussions. The Elon Musks and Robert Zubrins of the world are fierce proponents, viewing the expansion of humanity as a matter of survival; on... Continue Reading →

The Decline and Fall of Mars One

Sometimes, the underdog really does win against the odds. Sometimes, a small, plucky band of visionaries, armed only with a dream, really can rise to dizzying heights and reshape the world into something better. Sometimes, their success is so profound and transformative that later generations think it was inevitable all along. Mars One was not... Continue Reading →

TMK-E: The Nuclear Mars Train

Last week I posted a review of the 1963 film A Dream Come True, about a Soviet expedition to Mars, and today I'm going to share the Mars mission the Soviets were actually planning when that movie came out. It was... ambitious, to say the least. "Nuclear-powered Mars train from pole to pole" levels of ambitious.... Continue Reading →

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