<p>A proposed Discovery mission concept led by NASA’s Jet Propulsion Laboratory, Pasadena, Calif., to investigate the formation and evolution of terrestrial planets by studying the deep
<table cellspacing="0" cellpadding="0" width="215" align="left"> <tr> <td> <a rel="nofollow" href="http://www.esa.int/SPECIALS/Gagarin/SEMYN76UPLG_1.html" target="_blank"></a> </td> <td></td> </tr> <tr> <td> <p class="small" style="text-align: center;">Yuri’s night connected people throughout the world </p></td> <td></td> </tr> </table> <p>Space is an inspirational subject and human spaceflight in particular has motivated