7. Salyut 6
It is the first space station Program that was undertaken by the Soviet Union. It supervised total four space station and two military reconnaissance space stations.
8. James Webb Space Telescope
This space telescope is in construction and it is going to beat Hubble Space Telescope. This telescope costs $8.8bn total.
Date: Scheduled for 2018
Cost: $8.8bn (estimated)
This is a GPS-based system that costs an estimated amount of $6.3bn. It was created by the European Union.
Cost: $6.3bn (estimated)
Also known as the Global Navigation Satellite System based on radio navigation. It costs $4.7bn.