There are 2 players.
They plat the sport in the space.
They need space suits, rackets (not rockets, of course) and a flying saucer.
The players must be on the opposite sides.
The player have to throw the saucer into the space and strike it with his racket.
The other player have to return the sauser with his racket.
However, if you miss the saucer, you will lose the game.
This crazy sport is called Space Tennis.
Although it is a relatively new game, it is becoming more and more popular.