Deimos and Phobos Interior Explorer that the moons of Mars may have formed after a huge collision with a protoplanet one third the mass of Mars that formed a ring around Mars. A third hypothesis is that they may have co-accreted with the parent planet. DePhine mission would explore the origin and the evolution of the two Martian satellites, by focusing on their interior structures and diversity. The mission would attempt to determine if Phobos and Deimos true siblings, originating from the same source and sharing the same formation scenario. It would also determine if both natural satellites are rubble piles or solid bodies, and
What's Easy for Two Is Hard for One What's Easy for Two Is Hard for One "What's Easy for Two Is Hard for One" (also known as "What's Easy for Two Is So Hard for One") is a song written and produced by Smokey Robinson and released as a single by singer Mary Wells for the Motown label. In this song, the narrator is longing for a longtime partnership with a suitor and constantly begs the man to "take her to the preacher man" in hopes the couple does "what should be done" because "what two can easily do is so hard to be done by one". Released