Ключевые слова: adult, astronaut, astronomy, back, blackboard, board, chalk, chalkboard, class, classroom, college, concept, cosmos, draw, drawing, education, exam, exploration, explorer, galaxy, intelligence, intelligent, knowledge, learn, lecture, lesson, male, man, math, national back to school month, nature, nebula, planet, presentation, professor, rear, research, researcher, school, science, sky, space, star, student, study, suit, teacher, telescope, universe, university,