It takes the Earth one year to orbit the Sun and it takes Mars about 1.9 years (say 2 years for easy calculation) to orbit the Sun. The elliptical orbit which carries you from Earth to Mars is longer than Earth's orbit, but shorter than Mars' orbit.
Equity theory was first developed in 1963 by John Stacey Adams, a workplace and behavioral psychologist, who asserted that employees seek to maintain equity between the inputs that they bring to a job and the outcomes that they receive from it, against the perceived inputs and outcomes of others.
The Gestalt theory was founded by Max Wertheimer, Wolfgang Kohler and Kurt Koffka. All three theorists focused on different aspects of the theory that have developed individually. Wertheimer assessed Gestalt processing in terms of problem-solving.