A mysterious star and the tragic adventures of the saddest space explorers to ever leave Earth... Subscribe for new Dark5 ►► http://bit.ly/dark5 Like Dark5 on Facebook ► http://bit.ly/Dark5FB Follow Dark5 on Twitter ► http://bit.ly/Dark5Tweets Dark5 examines the saddest and loneliest robots, probes, satellites, and mysterious stars in our universe and beyond in a depressing space documentary. Including the Mars Curiosity rover's secret happy birthday song, the International Cometary Explorer sent on a space exploration mission and forgotten about by NASA on Earth, the tweeting Rosetta mission and the Philae lander that slowly ran out of power on Comet 67p, photos of the shattered remains of the European Space Agency's Schiaparelli Mars mission, and the mysterious baby star CX330 that has no friends and is considered the loneliest star in space.