Phobos (moon) tidal forces. Phobos could be a second-generation Solar System object that coalesced in orbit after Mars formed, rather than forming concurrently out of the same birth cloud as Mars. Another hypothesis is that Mars was once surrounded by many Phobos- and Deimos-sized bodies, perhaps ejected into orbit around it by a collision with a large planetesimal. The high porosity of the interior of Phobos (based on the density of 1.88 g/cm, voids are estimated to comprise 25 to 35 percent of Phobos's volume) is inconsistent with an asteroidal origin. Observations of Phobos in the thermal infrared suggest a composition containing
One Is the Other particular focus on a clearly vibrant New York scene, the sublimely open "One is the Other" is both this quartet's best record yet, and further evidence to counter those who accuse ECM's purview of being too Euro-centric." "All compositions by Billy Hart, except where noted" One Is the Other One Is the Other is an album by jazz drummer Billy Hart, released on ECM Records in 2014. The "AllMusic" review by Thom Jurek states ""One Is the Other" is the sound of an experienced and deeply intuitive quartet speaking in a colorful and precise language numerous dialects and approaches to