Mars Express, one of the longest-running planetary probes ever made, was only intended to last for about two Earth years, but it’s still going at 17! And it’s taught us an unbelievable amount, including everything from studying its geology and atmosphere to searching for signs of life!
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Sources:
https://sci.esa.int/web/mars-express/-/51820-science-highlights-from-mars-express
https://mars.nasa.gov/express/technology/
https://www.space.com/18206-mars-express.html
https://www.planetary.org/blogs/emily-lakdawalla/2003/mars_express.html
http://adsabs.harvard.edu/full/2002ESASP.502..249J
http://articles.adsabs.harvard.edu/full/2004ESASP1240….3C
https://www.dlr.de/content/en/missions/marsexpress.html
https://www.astrobio.net/mars/mars-express-polar-water-ice-imaged/
https://sci.esa.int/documents/33745/35957/1567253672047-NeukemWeb.pdf [PDF]
https://www.esa.int/Science_Exploration/Space_Science/Mars_Express/Martian_glaciers_did_they_originate_from_the_atmosphere
https://www.space.com/1966-snow-mars-created-glaciers-equator.html
https://sci.esa.int/web/mars-express/-/51822-2-possible-detection-of-methane-in-the-atmosphere
https://www.esa.int/Science_Exploration/Space_Science/Mars_Express/First_evidence_of_planet-wide_groundwater_system_on_Mars
https://sci.esa.int/web/mars-express/-/61167-first-evidence-of-planet-wide-groundwater-system-on-mars
https://sci.esa.int/web/mars-express/-/51829-9-unambiguous-detection-of-carbon-dioxide-clouds
https://sci.esa.int/web/mars-express/-/51824-4-probing-the-polar-regions
https://sci.esa.int/web/mars-express/-/51827-7-discovery-of-localised-auroras-on-mars
https://sci.esa.int/web/mars-express/-/51828-8-mars-express-discovers-new-layer-in-martian-ionosphere
https://sci.esa.int/web/mars-express/-/51830-10-mapping-and-measuring-phobos-in-unprecedented-detail
Images:
https://commons.wikimedia.org/wiki/File:Mars96_Assembly.jpg
https://en.wikipedia.org/wiki/File:Martian_south_pole_during_summer_by_HRSC.jpg
https://commons.wikimedia.org/wiki/File:Artist%27s_impression_of_Mars_Express_and_Phobos_ESA233015.jpg
https://en.wikipedia.org/wiki/File:Mars96_surface_station.jpg
https://en.wikipedia.org/wiki/File:Beagle_2_replica.jpg
https://commons.wikimedia.org/wiki/File:PIA19106-Beagle2-Found-MRO-20140629.jpg
https://www.esa.int/ESA_Multimedia/Images/2016/10/Perspective_view_in_Colles_Nili#.XrlpRgFBk2I.link
https://www.dlr.de/content/en/missions/marsexpress.html
https://en.wikipedia.org/wiki/File:ESP_028352_2245glacier.jpg
https://en.wikipedia.org/wiki/File:Martian_Methane_Map.jpg
https://en.wikipedia.org/wiki/File:PIA19088-MarsCuriosityRover-MethaneSource-20141216.png
https://svs.gsfc.nasa.gov/4798
https://mars.nasa.gov/resources/21352/estimated-water-depths-in-ancient-martian-sea/
https://en.wikipedia.org/wiki/File:PIA22546-Mars-AnnualCO2ice-N%26SPoles-20180806.gif
https://www.nasa.gov/image-feature/goddard/2017/solar-storm-triggers-whole-planet-aurora-at-mars
https://commons.wikimedia.org/wiki/File:Geometry_of_the_Phobos_fly-by_ESA232820.png
https://en.wikipedia.org/wiki/File:Phobos_colour_2008.jpg
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