December 29, 2018
Another birthday means another year in which the universe got to experience itself through your particular combination of wonder and will.
New Horizons at Ultima Thule
Birthday · December 29, 2018
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APOD published December 29, 2018. Full image credits are on the original APOD entry below. A publication-date match, not a photo taken on your date. Independent of NASA.
When we celebrate the start of 2019, on January 1 the New Horizons spacecraft will fly by Ultima Thule. A world of the Kuiper belt 6.5 billion kilometers from the Sun, the nickname Ultima Thule (catalog designation 2014 MU69) fittingly means "beyond the known world". Following its 2015 flyby of Pluto, New Horizons was targeted for this journey, attempting the most distant flyby for a spacecraft from Earth by approaching Ultima Thule to within about 3500 kilometers. The tiny world itself is about 30 kilometers in size. In 2017 and 2018, observing campaigns with Earth-based telescopes determined the shape of the object to be a contact binary or a close binary sytem as in this artist's illustration. New Horizons will image close up its unexplored surface in the dim light of the distant Sun.