Besides his founding the science of jabr, he made major contributions in astronomy and mathematical geography. In this article, focus is laid on his mathematical work in the field of algebra and his contribution in setting the foundation of the Islamic tradition of mathematical geography and cartography.
In his doctoral thesis, written inTisserand extended Delaunay 's work on the three-body problem on the orbit of the Moon. Tisserand was then appointed as an assistant-astronomer at the Paris Observatory.
This was an unfortunate time at the Paris Observatory since its Director Le Verrier had become very unpopular following his drive for efficiency and attempts were being made to have him removed. Tisserand showed remarkable abilities in his work at the Observatory and it was clear that he would soon achieve an elevated position in the world of astronomy.
In Tisserand was appointed director of the Toulouse Observatory to succeed Daguin, a post which he held for five years. At the Toulouse Observatory Tisserand appointed two young astronomers, Joseph Perrotin and Guillaume Bigourdanto help him in his observational work.
Neither were experienced in astronomy but Tisserand had made two good choices for he soon trained the young men to become astronomers of outstanding qualities.
Tisserand did not spend the whole of his five years as director in Toulouse. In he went to Japan to make observations of the transit of Venus which occurred that year. A transit of Venus is when the planet passed in front of the disc of the sun as viewed from the Earth and Tisserand took a year to make the journey to Japan, make his observations, and return to France.
In order to keep the Toulouse Observatory operating during this lengthy absence Jules Gruey, a teacher at the Toulouse Faculty of Science was appointed temporary director.
After Tisserand returned to France and took over again as director of the Observatory in Toulouse he had a new instrument installed. However the 83 centimetre telescope installed in was not a great success since the wooden base was not stable enough to allow photography.
Having a telescope which could not be used for photography was rather unfortunate since most astronomical work at that time required that facility. Tisserand decided to undertake a programme of measurement of the separation of binary stars, but he discovered that the micrometer used for such measurements did not work.
He decided that he could only use the defective telescope for observing the planets and together with his assistants he made observations of the moons of Jupiter and Saturn.
From until his death he was director of the Paris Observatory. When he arrived to take up the post of director work was being undertaken at the Observatory on the Catalogue photographique de la carte du ciel the Photographic Catalogue of the Map of the Sky.
Tisserand took over the task of completing this major work and arranged for its publication. Tisserand is especially remembered for his four volume textbook which is an update of Laplace 's work. Despite being years old this textbook is still sometimes referred to by current writers of celestial mechanics books.
In he was elected to the Academy of Sciences as a corresponding member and was elevated to full membership in Pierre Simon Laplace was born at Beaumont-en-Auge in Normandy on March 23, , and died at Paris on March 5, He was the son of a small cottager or perhaps a farm-labourer, and owed his education to the interest excited in some wealthy neighbours by his abilities and engaging presence.
Elementary mathematical astronomy, with examples and examination papers Elementary mathematical astronomy, with examples and examination papers. by Barlow, Crossley William Crosby, ; An elementary class book on astronomy in which mathematical demonstrations are omitted.
Jan 23, 01/Pages: Basic Mathematics for Astronomy A Manual for Brushing off the Rust by Dr. Glenn Tiede Version August 10, 1 If this doesn’t work, the University provides an entire academic unit, the Mathematics and Statistics Tutoring Center, which is there to help you with mathematical concepts.
Main sources: Astronomy/Mathematics, Mathematical astronomy, and Astromathematics Def. the branches of mathematics used in the study of astronomy, astrophysics and cosmology is called astromathematics.
This work was an outstanding contribution to mathematical astronomy coming quickly after the publication of the second volume of Delaunay's work on lunar theory La Théorie du mouvement de la lune which had been published in Tisserand was then appointed as an assistant-astronomer at the Paris Observatory.
Tisserand's recent work may be taken as the modern presentation of dynamical astronomy on classical lines, but Laplace's treatise will always remain a standard authority.