Extraterrestrial skies Mars appears to be the angular diameter as seen from Earth (0.35°), and sends 40% of the light, approximately the brightness of a slightly cloudy afternoon on Earth. On June 3, 2014, the "Curiosity" rover on Mars observed the planet Mercury transiting the Sun, marking the first time a planetary transit has been observed from a celestial body besides Earth. Mars has two small moons: Phobos and Deimos. From the Martian surface, Phobos has one-third to one-half the angular diameter of the Sun while Deimos is barely more than a dot (only 2′ angular diameter). The orbital period of Phobos
Mars One (orbiter). On 3 March 2014 Mars One announced a working agreement with Uwingu, stating that the program would use Uwingu's map of Mars in all of their missions. Since the official announcement of their conversion to a "Stichting" foundation, Mars One has been accepting donations through their website. As of 4 July 2016, Mars One had received $928,888 in donations and merchandise sales. The 2016 donation update adds the Indiegogo campaign ($313,744) to the private donation and merchandise total. On 10 December 2013, Mars One set up a crowdfunding campaign on Indiegogo to help fund a 2018 demonstration robotic mission