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Neil deGrasse Tyson pushes exploration in Space Chronicles

Plans for NASA have seen some large swings in recent years. First came President Bush’s ambitious vision for a return to the Moon with a new spacecraft. Then it was President Obama’s reorganization of the space program, hastening the retirement of low Earth orbit vehicles and opening the door to the private sector. Over the past few months, NASA has been struggling to defend funding for various projects as budget cuts are being considered in the political arena. Being buffeted by the winds of political change has become standard operating procedure for NASA.

That’s one of the themes of Neil deGrasse Tyson’s new book, Space Chronicles: Facing the Ultimate Frontier. Tyson, an astrophysicist and director of the Hayden Planetarium at the American Museum of Natural History in New York, has become a celebrity face of American science—and for good reason. He has an easy-going, good-humored demeanor and he knows how to talk to the public, not just in a way people will understand, but in a way that makes them care. He has an infectious passion and optimism for science, and he’s always having fun. He just makes you want to get on his team.

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Figuring out why most of Titan’s methane lakes have northern exposures

Saturn’s moon Titan is one of the most intriguing bodies in our solar system. Its dense atmosphere and lakes of liquid methane make it both beautiful and bizarre, as well as a tantalizing target for those seeking extraterrestrial life. To me, though, the most amazing thing (so far) has been the revelation that is Titan’s meteorology. There’s something extraordinary about imagining liquid methane falling as rain on another world—it’s so similar to our experience, yet so very different. Earth has a familiar hydrologic cycle; Titan has an alien methane cycle.

In a letter published in Nature, researchers describe a model that successfully simulates some key aspects of Titan’s weather. The model offers possible explanations for some of the moon's quirky features that have long been puzzling.

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