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
Mount Sharp begin an journey from the Glenelg area to the base of Aeolis Mons. On November 13, 2013, NASA announced that an entryway "Curiosity" would traverse on its way to Aeolis Mons was to be named "Murray Buttes", in honor of planetary scientist Bruce C. Murray (1931–2013). The trip was expected to take about a year and would include stops along the way to study the local terrain. On September 11, 2014, NASA announced that the "Curiosity" rover had reached Aeolis Mons, the rover mission's long-term prime destination. On October 5, 2015, possible recurrent slope lineae, wet brine flows, were reported