<p><a href="http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2015/07/20_soho_views_of_the_sun/15509549-1-eng-GB/20_SOHO_views_of_the_Sun_node_full_image_2.jpg" target="_blank"></a></p> <p>The Solar and Heliospheric Observatory (SOHO) has been watching the Sun for almost 20 years. In that time it has seen solar activity ramp up and die down
<p></p> <p>As NASA missions explore our solar system and search for new worlds, they are finding water in surprising places. Water is but one piece of our search for habitable planets
<p></p> <p>This dramatic panorama shows a colourful, shimmering auroral curtain reflected in a placid Icelandic lake. The image was taken on 18 March 2015 by Carlos Gauna, near Jökulsárlón Glacier Lagoon
<p><a href="http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2015/03/first_detection_of_molecular_nitrogen_at_a_comet/15318003-1-eng-GB/First_detection_of_molecular_nitrogen_at_a_comet.jpg" target="_blank" rel="nofollow"></a></p> <p>ESA’s Rosetta spacecraft has made the first measurement of molecular nitrogen at a comet, providing clues about the temperature environment in which Comet 67P/Churyumov–Gerasimenko formed.</p> <p>Rosetta arrived last
<p></p> <p>This snapshot of our constantly changing Sun catches looping filaments and energetic eruptions on their outward journey from our star’s turbulent surface.</p> <p>The disc of our star is a rippling mass
<p></p> <p>Auroras are the most visible manifestation of the Sun’s effect on Earth, but many aspects of these spectacular displays are still poorly understood. Thanks to ESA’s Cluster and NASA’s Image
<p></p> <p>Since 2012, NASA’s Voyager 1 spacecraft has experienced three ‘tsunami waves’ in interstellar space. The most recent, which reached the spacecraft earlier this year, is still propagating outward according
<p>All three NASA orbiters around Mars confirmed their healthy status Sunday after each took shelter behind Mars during a period of risk from dust released by a passing comet.</p> <p>Mars Odyssey,
<p style="text-align: center;"><a href="http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2014/10/mars_and_comet_siding_spring/14982454-1-eng-GB/Mars_and_comet_Siding_Spring.jpg" target="_blank"></a></p> <p>This weekend, Comet Siding Spring (C/2013 A1) will make a historically close approach to Mars. Satellites and rovers will get an eye-full as the green comet
<p style="text-align:center"></p> <p>After 10-month voyage across more than 400 million miles of empty space, NASA’s MAVEN spacecraft reached Mars on Sept. 21st 2014. Less than 8 hours later, the data