Each of these Earth-observing satellites, known as Doves, is just 12 inches long by 4 inches wide by 4 inches high (30 by 10 by 10 centimeters) and weighs about

Each of these Earth-observing satellites, known as Doves, is just 12 inches long by 4 inches wide by 4 inches high (30 by 10 by 10 centimeters) and weighs about 10 lbs. (4.5 kilograms). At that size, you can put 1000s into space at once.