http://www.haydenplanetarium.org/tys...he-tidal-force Dostupné online "The Tidal Force | Neil deGrasse Tyson" Dostupné online http://www.haydenplanetarium.org/tys...he-tidal-force "The Tidal Force | Neil deGrasse Tyson" "The Tidal Force | Neil deGrasse Tyson" Hayden Planetarium: The Tidal Force