Muhyi al-Din al-Maghribi

In astronomy, Muhyi l'din carried out a large‐scale project of systematic planetary observations, which led to the development of several new astronomical parameters.

[2] At Maragheh, Muhyi l'din observed up to a total of eight of the brightest stars,[dubious – discuss] of which he used the latitudes collected to compare with the values within ancient computations.

[5][page needed] He concluded that the difference between his latitudes and ancients were not substantial, and any inconsistences were in fact due to the observations and not the subject itself.

For instance, Muhyi l'din supposed that the precession would only occur in a motion that was uniform and continuous at a rate that was 1° for ever 66 years from his systematic stellar observations.

[3][page needed] Muhyi l'din considered the problem of doubling the cube, which he approached means of a method devised by the Greek mathematician Hippocrates of Chios.