<p></p> <p>Registration is open for a free online course that provides an introduction to monitoring climate change using satellite Earth observation.</p> <p>ESA has teamed up with FutureLearn, a leading online learning platform,
<p style="text-align:center"><a href="http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2014/03/international_space_app_challenge_2014_locations/14355205-2-eng-GB/International_Space_App_Challenge_2014_locations_fullwidth.jpg" target="_blank"></a></p> <p>Satellites, astronauts and experiments are constantly observing our planet and beaming information back to us. Navigation satellites tell us where we are, observation satellites can tell us
<table cellspacing="0" cellpadding="0" width="300" align="right"> <tr> <td align="right"> <p><a href="http://www.esa.int/esaCP/SEM9D6WO1FG_index_1.html"></a></p></td> </tr> <tr> <td align="center"> <p class="small">Volcanic cones along lava path</p> </td> </tr> </table> <p>Scientists are crediting satellite imagery with helping to predict where volcanic eruptions could strike. It is