15 facts about Ganymede
Ganymede is a huge moon by solar system standards. It is larger than Pluto and Mercury. Apparently, it was observed with the naked eye in ancient time ...
The Cold War, although a grim period in world history, brought an intense rivalry in a space race between the U.S., and the Soviet Union. As a result, the most famous space-related organization—NASA—was established, and the dream of conquering the cosmos finally started to come true.