Mars mainly phyllosilicates and other minerals known from Mars, point toward an origin of Phobos from material ejected by an impact on Mars that reaccreted in Martian orbit, similar to the prevailing theory for the origin of Earth's moon. Although the VNIR spectra of the moons of Mars resemble those of outer-belt asteroids, the thermal infrared spectra of Phobos are reported to be inconsistent with chondrites of any class. Mars may have moons smaller than in diameter, and a dust ring is predicted to exist between Phobos and Deimos. Dozens of crewless spacecraft, including orbiters, landers, and rovers, have been sent
Two Moons Two Moons Two Moons (1847–1917), or "Ishaynishus" (Cheyenne: "Éše'he Ôhnéšesêstse"), was one of the Cheyenne chiefs who took part in the Battle of the Little Bighorn and other battles against the United States Army. Two Moons was the son of Carries the Otter, an Arikara captive who married into the Cheyenne tribe. Perhaps known best for his participation in battles such as the Battle of the Rosebud against General Crook on June 17, 1876, in the Montana Territory, the Battle of Little Big Horn on June 25, 1876 and what would prove to be his last battle, the Battle of