No airplane is ever in zero gravity!
Physicist spend their time thinking about black holes, dark matter, dark energy, string theory and time. They do not think about why they are weightless in orbit or why they are weightless in an airplane named “Zero Gravity.”
Physicist deny that there is a centrifugal force!
Therefore, I will continue to try to correct the mistake they teach.
JAMES JACKSON
Carlisle, Ind.
Of course, nothing in the entire universe is free from gravity. Gravity is universal. However, the force of gravity can be brought to zero in a specific body by centrifugal force.