It’s commonly believed that astronauts on the space station are weightless because of the absence of gravity, yet the pull of gravity on the space station is virtually the same as here on Earth.
In this YouTube clip, Dr Derek Muller gives a very clear and entertaining explanation of the real reasons why astronauts float in space.
Click on Common Misconceptions to see other things that are often misunderstood.
The Naked Vocational Trainer 