What would happen if you were flying a spaceship near a black hole? Find the answer, along with a whole solar system of games and puzzles.
What is a black hole? How do we know that stars and galaxies are billions of years old? What is the difference between stars and planets? Find the... дальше
в наличии*; ориентировочная дата отгрузки: 22.11.2017 (Ср.)