ИСТИНА

The Impact-Rotational Mechanism and Origin of the Grooves on Phobos and Other Small IT has long been known1-4 that on inner Martian satellite Phobos are systems of long linear depressions, or grooves, discovered in 1976 with the American station "Viking". The origin of the grooves remains highly problematic, and it strengthens interest to Phobos5-10. Earlier some hypotheses for formation of the grooves on Phobos were offered. But each of them illuminates only separate sides of this puzzling phenomenon. Some scenarios, such as the hypothesis of the origin of the tidal grooves far exhausted. Another group of hypotheses relates the origin of grooves with movement of large boulders in regolith. But these hypotheses come into conflict with the so-called energy paradox. The essence of this paradox is that for creating the groove in length some kilometers, the boulder must has such velocity, which inevitably result to elimination of this boulder with surface of Phobos. We present here a new impact-rotational mechanism that eliminates the energy paradox. Main point of the mechanism is that the boulders can are slow to move through the regolith and create the grooves as long as the kinetic energy is supplied to them from the additional rotation of Phobos.