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Planetary Report The PLANETARY REPORT Volume XXX Number 3 May/June 2010 Why Go Into Space? From The Editor On the Cover: This dazzling, visible-light portrait of the Orion nebula was his 30th anniversary year has had me looking taken by the European Southern Observatory’s new Visible Tback to the beginning of The Planetary Soci- and Infrared Survey Telescope for Astronomy (VISTA). Most of ety, while our LightSail program keeps pulling the light from the spectacular clouds comes from hydrogen gas glowing under the fierce ultraviolet glare of the hot young my thoughts to the future. In 1980, The Planetary Society launched while stars at center. The region above Orion’s center is obscured Carl Sagan was presenting his personal view of by clouds of dust. Image: ESO/J. Emerson/VISTA & R. Gendler, the universe on television screens around the with thanks to the Cambridge Astronomical Survey Unit world. There’s no question that our organization’s success is linked directly to the phenomenon that Background: was Cosmos. To honor that connection, in 2005, It’s easy to forget—as we deal with the day-to-day challenges we created the Cosmos Award for Outstanding of life—that we live on a planet whose normal geologic Public Presentation of Science. The first recipi- activity can trump our most important plans. Here, lava ent was filmmaker James Cameron (who’s had spews out of a mountain on March 21, 2010, in the region a rather big success of his own lately). This February, we presented The Planetary of Iceland’s Eyjafjallajökull volcano. Society’s Cosmos Award to physicist Stephen Photo: Fior Kjartansson/AFP/Getty Images Hawking. He’s probably the most famous scien- tist alive on Earth today, but we honored him in particular for investing his energy and intellect in bringing science alive for people around the world. We share his remarks about the award with you in this issue. Meanwhile, we’re making steady progress on LightSail-1, developing solar sail technology for the future, as you’ll also read in these pages. Because we’re relying on a piggyback launch on another spacecraft’s rocket, we have to wait for the right opportunity, and it looks like that will come no sooner than the second quarter of 2011. With luck and hard work, next year, as The Planetary Society launches into its fourth decade, you and I will be part of a mission whose ulti- mate destination is the stars. That’s about as far into the future as I’m prepared to look. —Charlene M. Anderson Contact Us Mailing Address: The Planetary Society, 85 South Grand Avenue, Pasadena, CA 91105-1602 General Calls: 626-793-5100 E-mail: [email protected] Internet: planetary.org The Planetary Report (ISSN 0736-3680) is published bimonthly at the editorial offices of The Planetary Society, 85 South Grand Avenue, Pasadena CA 91105-1602, 626-793-5100. It is available to members of The Planetary Society. Annual dues in the United States are $30 (U.S. dollars); in Canada, $40 (Canadian dollars). Dues in other countries are $45 (U.S. dollars). Printed in USA. Third-class postage at Pasadena, California, and at an additional mailing office. Canada Post Agreement Number 87424. Editor, CHARLENE M. ANDERSON Copy Editor, A.J. SOBCZAK Associate Editor, DONNA ESCANDON STEVENS Proofreader, LOIS SMITH Managing Editor, JENNIFER VAUGHN Art Director, BARBARA S. SMITH Technical Editor, JAMES D. BURKE Science Editor, BRUCE BETTS Viewpoints expressed in columns and editorials are those of the authors and do not necessarily represent positions of The Planetary Society, its officers, or its advisers. ©2010 by The Planetary Society. 2 THE PLANETARY REPORT MAY/JUNE 2010 Cofounder CARL SAGAN 1934–1996 Board of Directors Chairman of the Board DAN GERACI Chairman and CEO, Club Achilles—The Iron Age Contents President JAMES BELL Professor of Astronomy, Cornell University Vice President BILL NYE 4 Lightsail Update: Firming Up science educator Executive Director the Spacecraft Design LOUIS D. FRIEDMAN HEIDI HAMMEL Senior Research Scientist and Co-Director, by Louis D. Friedman Research, Space Science Institute G. SCOTT HUBBARD professor, Stanford University WESLEY T. HUNTRESS JR. Director Emeritus, Geophysical Laboratory, 8 World Watch: The New Plan Carnegie Institution of Washington LON LEVIN for Human Exploration SkySevenVentures ALEXIS LIVANOS Corporate Vice President and Chief Technology Officer, by Louis D. Friedman Northrop Grumman Advisory Council Chair CHRISTOPHER P. McKAY planetary scientist 10 Why Go Into Space? BRUCE MURRAY Professor of Planetary Science and Geology, California Institute of Technology by Stephen Hawking ELON MUSK Chairman and CEO, SpaceX JOSEPH RYAN Ryan Investments, LLP 16 We Make It Happen! BIJAL “BEE” THAKORE Regional Coordinator for Asia Pacific, Asteroids, DVDs, and Dust Space Generation Advisory Council NEIL deGRASSE TYSON Astrophysicist and Director, Hayden Planetarium, by Bruce Betts American Museum of Natural History GEORGE YANCOPOULOS President and Chief Scientific Officer, Regeneron Research Laborabories 20 Questions and Answers International Council ROGER-MAURICE BONNET Executive Director, 22 Members’ Dialogue International Space Science Institute YASUNORI MATOGAWA Associate Executive Director, 23 Society News Japan Aerospace Exploration Agency MAMORU MOHRI Director, National Museum of Emerging Science and Innovation RISTO PELLINEN Director of Science in Space Research, Finnish Meteorological Institute Advisory Council BUZZ ALDRIN RICHARD BERENDZEN JACQUES BLAMONT RAY BRADBURY ROBERT. D. BRAUN DAVID BRIN JAMES CANTRELL FRANKLIN CHANG-DIAZ FRANK DRAKE OWEN GARRIOTT GARRY E. HUNT BRUCE JAKOSKY THOMAS D. JONES SERGEI KAPITSA CHARLES E. KOHLHASE JR. LAURIE LESHIN JOHN M. LOGSDON JON LOMBERG ROSALY LOPES HANS MARK JOHN MINOGUE ROBERT PICARDO JOHN RHYS-DAVIES KIM STANLEY ROBINSON DONNA L.SHIRLEY KEVIN STUBE A PUBLICATION OF 3 THE PLANETARY REPORT MAY/JUNE 2010 LIGHTSAIL Update: Firming Up the Spacecraft Design by Louis D. Friedman LightSail-1 glides along its orbit 800 kilometers he LightSail-1 spacecraft development is pro- (500 miles) above Earth’s surface. The only energy ceeding well. Our engineering team—led by Jim source propelling this elegant spacecraft’s flight Cantrell—has completed the preliminary design is pressure from the very sunlight that sparkles T off its filmy sails. and made critical decisions to select the hardware and 4 Illustration: Rick Sternbach for The Planetary Society subsystem for the final design—crucial milestones to THE PLANETARY REPORT MAY/JUNE 2010 the first of our planned series of three flights. The three missions will be progressively more ambi- tious, starting in Earth orbit and moving out into the solar system. One anonymous Member got the program off to a flying start with a donation of $1 million. From around the world, other Members have come through with matching donations, ranging from $5 to $100,000, that have allowed us to begin work on this ambitious project. Design Reviews In January, we completed the pre- liminary design review (PDR). A team of aerospace experts— including former Jet Propulsion Laboratory project managers Har- ris M. (Bud) Schurmeier, Glenn Cunningham, and Donna Shirley, as well as Aerospace Corpora- tion’s David Bearden—evaluated progress to date. This review panel went over the development of the LightSail program, including mis- sion requirements. The panel members agreed that our self-imposed requirements might be too ambitious to meet given the available resources and suggested relaxing some capabili- ties until the second or third Light- Sail mission. After all, plans for our first spacecraft, LightSail-1, were pushing the limits of what can be accomplished with a four- kilogram spacecraft while also introducing new capabilities such as an attitude control system, two radios, onboard imaging, a solar pressure sensor, and, of course, the deployable sail. As you may remember, Light- building the vehicle that will demonstrate the value and Sail-1 is only the beginning of an innovative program. potential of using sunlight alone to propel exploratory We will start with a craft launched to an orbit about craft through space. 800 kilometers (500 miles) above Earth, beyond the Thanks to you and your fellow Planetary Society first-order effects of the atmosphere, where we can test Members, we are well under way with LightSail-1, the sail’s performance in space. LightSail-2 will move 5 THE PLANETARY REPORT MAY/JUNE 2010 farther away from Earth, and with LightSail-3 we hope of microminiaturized, high-performance accelerome- to reach interplanetary space and test how solar sails ters for our spacecraft. We’ve just signed an agreement could be used to monitor solar storms that may with Millennium Space Systems to that end; the com- threaten technological civilization on Earth. pany will provide the software and special processing The project team has thoroughly reviewed the mission algorithms to utilize these accelerometers for the requirements and their implications for the spacecraft. LightSail mission. As a result of the review, we’ve simplified several Now we’re getting ready for the critical design aspects of the design, such as the onboard cameras, review (CDR). After that, we’ll freeze the design and going to a single-channel radio from a two-radio begin building and testing the spacecraft. Following system, and reducing the redundancy among orbital the review team’s recommendations, we decided to velocity measurements. We can rely solely on ground hold our CDR in June rather than in April. This will observations for orbit determination, although I give us more time for the subsystem decisions and remain devoted to the idea of onboard acceleration enable us to be more specific about our orbit and data if we can accommodate the instrumentation. mission design. The reviewers also suggested that we build more time into the schedule for testing and evaluation. Our Planning an Uncertain Launch 16-month schedule was built around three key elements: Our goal was to finish spacecraft development and a limited budget, getting ready for a launch late in be ready for launch by the end of 2010.
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