Space and Astronomy

Opinion: Hostile Alien Invaders Are Unlikely

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Sorry Stephen Hawking, I agree with Jill Tarter. Hostile alien invaders are unlikely–at least not the kind envisioned in SciFi movies. I received the news release reproduced below and it reminded me of a book manuscript that I now have under consideration at a major publisher of books for young readers. That manuscript looks ahead … Read more

Pioneer Anomaly is no longer anomalous

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Thanks to funding from the Planetary Society, of which I am a proud member, the “Pioneer Anomaly” has been definitively resolved. Physics has prevailed over speculation. Over the past 20 years, some people, including a few scientists, have looked at oddities in the trajectories of the Pioneer 10 and 11 spacecraft and proposed that our … Read more

More on Pioneer Anomaly

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This new information makes it pretty clear that the cause of the Pioneer Anomaly, that is the deviation of the Pioneer spacecraft from the trajectories dictated by gravity alone, is due to thermal sources internal to the spacecraft. A satisfying result, though it produces no new physics.

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James Webb Space Telescope on Chopping Block

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URGENT from Heidi Hammel: “The House Commerce, Justice, and Science Appropriations Subcommittee has proposed termination of the James Webb Space Telescope. Now is the time to contact your representatives in Washington, as well as members of the Appropriations Subcommittees, if you support JWST.”

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Track Kepler’s Candidate Exoplanets with a new app

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I’m not an app person, but when I got an e-mail from Hanno Rein of the Institute for Advanced Study at Princeton University suggesting that I look at a new iPhone/iPad app called “Kepler” to track the ever-increasing list of candidate exoplanets from the Kepler satellite, I decided to check it out.

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Jim Elliot, discoverer of rings of Uranus, 1943-2011

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One of the themes in my writing for young readers has been that a scientist’s achievements flow from the richness of his or her life, that s/he is more than his/her discoveries. So I share this obituary of Jim Elliot, who was planetary astronomer Heidi Hammel’s mentor. I never met him, but his kindness was apparent through e-mails exchanged during and after my writing of Heidi’s biography in the Women’s Adventures in Science series.

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