With an elliptical dish, it is possible to receive signals from 5 satellites. Pay TV customers, such as Dish Networks, can use a SuperDish with 8 LNBs.A single fixed dish? Seriously, try to find a basic reference and read about the general concepts of satellite TV reception.
With the dish posted by DrSat, it supports 10+ satellites.
Using a large 6 ft dish, it should be possible to receive signals from at least 4, if not 5, satellites.