#OTD 2005 We knew @CassiniSaturn could receive #Huygens signals because of a modest hero named Boris Smeds https://t.co/CuN7bjAlNu — ESA Operations (@esaoperations) January 14, 2017

A major milestone in solar system exploration: the 2005 descent of @ESA's Huygens probe to Saturn's moon Titan https://t.co/mptmspCMk4 pic.twitter.com/gRoU0MFvoR — CassiniSaturn (@CassiniSaturn) January 11, 2017

#OTD in 2005, at 09:05 UT, #Huygens entered Titan's atmosphere 1270 km above the moon's surface, its parachute deploying a few mins later pic.twitter.com/zpxXheCqHi — ESA Science (@esascience) January 14, […]

#OTD in 2005 #Huygens took ~2.5h to descend through Titan’s atmosphere; relive descent with this narrated movie: https://t.co/JhHWfzmMxV — ESA Science (@esascience) January 14, 2017

Memorable picture to mark @Thom_astro's first #spacewalk! https://t.co/KMoifPINMo — ESA (@esa) January 13, 2017

Tomorrow marks 12 years since the historic touchdown of #Huygens on the surface of #Titan, 1.2 bn km away https://t.co/CuN7bjAlNu pic.twitter.com/LgQoYLgdmx — ESA Operations (@esaoperations) January 13, 2017

We did it! @Astro_Kimbrough & @Thom_Astro celebrate this morning’s successful #spacewalk with an orbital high-five: https://t.co/mzKW5uDsTi pic.twitter.com/yvYw6YhB9w — NASA (@NASA) January 13, 2017

.@AstroPeggy opening the airlock to get @Thom_astro & @astro_kimbrough back inside the @Space_Station. #spacewalk pic.twitter.com/RxWOkdDElC — Human Spaceflight (@esaspaceflight) January 13, 2017