 So how many satellites are there in total? 4,519 Starlink satellites, which obviously isn't all of them, but we know that they're a big cheese. Every second satellite is one of theirs. OK, so about 9,000 satellites in total. How much does a satellite weigh? OK, they annoyingly vary in mass. Some are six tonnes, some are shoebox. Let's take an average 800 kilograms.