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The Planetary Report

Volume XXVI, Number 1, January/February 2006

January / February 2006
Credit: ISAS / JAXA


On the Cover

"If you build a high tower and climb it, you will see a new horizon," said Jun'ichiro Kawaguchi of the Japan Aerospace Exploration Agency's Hayabusa mission to asteroid Itokawa. Hayabusa (which means "falcon" in Japanese) has been beset with troubles in its mission to the near-Earth asteroid, but it has still returned remarkable images and has set the stage for future sample return missions. Hayabusa captured this image of Itokawa on October 22, 2005.

From The Editor

At The Planetary Society, we don't like to leave a job unfinished. When that job is completing the initial reconnaissance of the solar system, we are particularly determined to see it through. In fact, we demanded that it be done, "it" being the launch of a spacecraft to Pluto, the last unexplored planet in our neighborhood. (If you want to debate whether Pluto deserves the title of planet, see our website, planetary.org.)

Now, New Horizons is on its way to explore Pluto and the icy worlds of the Kuiper belt beyond Neptune. This mission might never have launched without the dedicated and sustained efforts of Planetary Society members, who over and over again fought to keep this mission alive. At the prelaunch press conference, the mission's principal investigator, Alan Stern, publicly recognized our organization's unflagging support for New Horizons. That's unprecedented.

There is no more graphic demonstration of The Planetary Society's effectiveness than this. We can all be proud. Working together, our members truly made it happen.

So what next? Europa, Titan, even the Moon and Mars -- think of all the unexplored territory out there. Will humanity reach out to these new worlds? You bet. The Planetary Society will make it happen.

— Charlene M. Anderson

Features

Hayabusa: A Daring Sample Return Mission
Japan's ambitious mission to land on an asteroid, collect samples, and return them to Earth has had its ups and downs. The tiny but robust spacecraft, with its determined ground crew, worked through problem after problem on its way to sample asteroid Itokawa. In the end, the "little spacecraft that could" revealed for the first time the rocky surface of Itokawa, dropped a memento from Earth onto its surface, and may have collected a sample of surface dust to return to Earth. Although we don't yet know if engineers will be able to guide the spacecraft back to Earth for the sample return, the Hayabusa mission team has much to be proud of. Journalist A.J.S. Rayl has been reporting on the spacecraft since before its launch in 2003. Here, she tells the story of Hayabusa's harrowing adventure.

Deep Impact: Understanding Comet Tempel 1
On July 4, 2005, the Deep Impact spacecraft sent a 370-kilogram (820-pound) copper ball on a collision course with comet Tempel 1 to give us our first look inside a comet. Within minutes of the impact, the spacecraft returned to Earth spectacular images of the explosive event. Exactly what these images and other data revealed, however, took much longer to analyze. Now, 6 months later, Deep Impact coinvestigator Lucy McFadden and coauthor Ray Brown detail what scientists are discovering about comet Tempel 1 and what Deep Impact has taught us about the oldest components of our solar system.

Departments

Members’ Dialogue
We Make It Happen!
World Watch
Questions and Answers
Society News

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