Starlink is going to way to access Internet from space. The project is very ambitious. It involves sending 12,000 satellites into orbit. To succeed, SpaceX will have to overcome new operational challenges.
Because of the large size of the constellation, SpaceX had to deal with new challenges:
The constellation starts with two prototype satellites. Their names are Microsat-2a and Microsat-2b. Both contain all subsystems required for the test. With the equipment, their mass is around 400 kg.