In space
Rockets can travel 40 000 km / h. This is the speed needed to escape Earth’s gravity and enter space.
A constant speed of 29,000 km / h keeps rocket into orbit.
Modern missiles are used to launch probes and satellites to space. The rocket is projected into space by three steps and fired off one after another.
Wernher von Braun is the inventor of the German V2 rocket, later he became the most important project in the U.S. space rocket.
In the past, there have been many ideas about space flight in one of them was trying to leave a space ship out of a cannon.
There is no air in space. As the Earth left behind, the air is getting thinner. When you go into space – at a height of 400 km, the air has disappeared altogether.
Flying fragments can kill an unprotected astronaut, if by then escaped from excessive heat, cold or radiation. It is dangerous to be up there! In 1996 a British satellite building was destroyed by a suitcase-sized fragment, detached from Ariante space rocket.
You can jump higher on the moon. When was the moon, astronauts can run and jump much further than Earth, it is because gravity is much weaker.