41 [ Teaching, tuition and training services in the field of science, physics and astronomy; education services, namely, arranging, organizing, conducting and providing teaching, tuition, training, instruction, mentoring, coaching, classes, lessons, seminars, courses, workshops, lectures, conferences, field trips, symposia, colloquia in the fields of science, physics and astronomy; providing information about educational services; vocational guidance in the field of science, physics and astronomy; career advisory and/or counseling services, namely, providing advice concerning education options to pursue career opportunities; arranging, organizing and conducting of exhibitions for educational purposes; arranging, organizing, conducting, hosting and staging presentations, meetings, seminars, tutorials, courses, classes, conferences, colloquia, congresses, debates, information briefings, symposia, training sessions, workshops, exhibitions, conventions, awards ceremonies, annual dinners, gala dinners, all for educational and social entertainment purposes; book publishing services; providing on-line non-downloadable electronic publications in the nature of books, booklets, magazines, periodicals, journals, manuals, handbooks, newsletters, updates, leaflets, pamphlets, flyers, worksheets in the fields of science, physics, astronomy and providing ongoing television and radio shows about such topics; publication of books and texts; writing of texts other than publicity texts; educational and entertainment services, namely, providing motivational and educational speakers; entertainment services, namely, providing webcasts and podcasts in the fields of science, physics, astronomy and of ongoing television and radio shows about such topics; ] entertainment services, namely, personal appearances by leading scientists; entertainment in the nature of live performances by a science professor