21![Outer Solar System Exploration Outer Planets Assessment Group (OPAG) Report Outer Solar System Exploration Outer Planets Assessment Group (OPAG) Report](https://www.pdfsearch.io/img/a0e04197027a29748f000aa08de0e0ca.jpg) | Add to Reading ListSource URL: sites.nationalacademies.orgLanguage: English - Date: 2015-01-15 17:43:12
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22![G r a d e s[removed]L e s s o n G r a d e s[removed]L e s s o n](https://www.pdfsearch.io/img/fe15eaeaf61e6531593ec0c543bb2468.jpg) | Add to Reading ListSource URL: www.nasa.govLanguage: English - Date: 2013-06-26 23:20:41
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23![15 Mar 20th 2007 Sources The lakes of Titan Stofan, E. R., Elachi C. , Lunine J. I. 15 Mar 20th 2007 Sources The lakes of Titan Stofan, E. R., Elachi C. , Lunine J. I.](https://www.pdfsearch.io/img/9b520e381775d99ea9cf57f441c62e90.jpg) | Add to Reading ListSource URL: smsc.cnes.frLanguage: English - Date: 2009-03-09 06:19:09
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24![number 07 May 22nd[removed]Sources number 07 May 22nd[removed]Sources](https://www.pdfsearch.io/img/5e26fab314ade0d28c3dc20080a29dac.jpg) | Add to Reading ListSource URL: smsc.cnes.frLanguage: English - Date: 2009-03-09 06:19:09
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25![Perspective on the Future of Exploration Rick Bachtel Pratt & Whitney Rocketdyne October 2008 Perspective on the Future of Exploration Rick Bachtel Pratt & Whitney Rocketdyne October 2008](https://www.pdfsearch.io/img/2841e392f859cfc1d9a7dad203eaf8fc.jpg) | Add to Reading ListSource URL: astronautical.orgLanguage: English - Date: 2013-07-28 15:49:55
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26![lookingback: Mexico City | 15 AMERICAN ASTRONAUTICAL SOCIETY lookingback: Mexico City | 15 AMERICAN ASTRONAUTICAL SOCIETY](https://www.pdfsearch.io/img/5f46416804225d0b83e12d7a36d5dfaa.jpg) | Add to Reading ListSource URL: www.astronautical.orgLanguage: English - Date: 2011-05-26 09:38:15
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27![AIAA[removed]Mars Direct: A Simple, Robust, and Cost Effective Architecture for the Space Exploration Initiative Robert M. Zubrin*† , David A. Baker*† and Owen Gwynne** * Martin Marietta Astronautics, PO Box 179, Den AIAA[removed]Mars Direct: A Simple, Robust, and Cost Effective Architecture for the Space Exploration Initiative Robert M. Zubrin*† , David A. Baker*† and Owen Gwynne** * Martin Marietta Astronautics, PO Box 179, Den](https://www.pdfsearch.io/img/de8c2ae876cd52854409d2c142e6739c.jpg) | Add to Reading ListSource URL: wp10988215.server-he.deLanguage: English - Date: 2012-04-13 16:59:07
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28![](https://www.pdfsearch.io/img/a776ef45b93ab3a9551edfc1d9c6783d.jpg) | Add to Reading ListSource URL: www.princetonastronomy.orgLanguage: English - Date: 2005-03-02 18:03:31
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29![Space Science Seminar Tuesday, 2014 May 6 10:30am NSSTC/2096 Exploration of the Saturn System by the Cassini Mission: Observations with the Cassini Infrared Spectrometer Space Science Seminar Tuesday, 2014 May 6 10:30am NSSTC/2096 Exploration of the Saturn System by the Cassini Mission: Observations with the Cassini Infrared Spectrometer](https://www.pdfsearch.io/img/4282c9b5294195606edff8cc344a9d24.jpg) | Add to Reading ListSource URL: solarscience.msfc.nasa.govLanguage: English - Date: 2014-05-02 10:56:54
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30![Meet Our Solar System Remember, kids—planets, stars, comets, and asteroids can’t really talk. But if they could, here is what they might say! “Hi, Earth children! My name is the Sun. You see me almost every day! I Meet Our Solar System Remember, kids—planets, stars, comets, and asteroids can’t really talk. But if they could, here is what they might say! “Hi, Earth children! My name is the Sun. You see me almost every day! I](https://www.pdfsearch.io/img/fc87084d9d7d14e2e61431088c4c97e3.jpg) | Add to Reading ListSource URL: discoverynewfrontiers.nasa.govLanguage: English - Date: 2012-03-05 09:45:24
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