In this report the main results from the visitor research of Heureka 2002 are presented. The interviews (N:12960) have been administrated during the traditional annual leisure time seasons (winter, Easter, summer, and autumn holidays). The subjects of the study have been selected from the visitors leaving the centre according the two-step sample representing the real population counted and estimated several times during the decade. The amount of female and male visitors is equal, and the age groups divided as follows: 7-14: 28%; 15-24: 12%; 25-44: 38%; 45-64: 18%; 65+: 4%. The school visits have been excluded from the population because the learning studies are administrated separately because of the validity and reliability of the results. The feed-back and attitudes has been measured by a traditional unidimensional Likert-scaling (five step) method, and the results are analysed by Statview-ANOVA paired/unpaired t-tests; and presented as interaction line charts with 95% confidence interval. At the end of the questionnaire, there is an option to give fee feed-back from the most positive and negative features of the experience. The focus of the analysis is on long term trends: comparison of years and its’ four seasons. As the background personal variables age, gender, educational status, and the region of living are registered. As the “social visitor-factors” the group of visiting with, the amount of visits before, the time-length of the visit, sources of information, and the reasons for the visit are registered and analysed as the visitor-background variables. The attitudes, opinions and feed-back is measured by 16 different items related to exhibition experience. Also the opinion related to extra-activities like restaurant and shop are asked. In addition, the feeling of been satisfied is asked with items related to recommend the visit for other people, and the intention to re-visit the exhibition. The main results show the diminishing amount of first time visitors as well as the growth in repeated visits while the amount of annual visits keeping on average 300 000 people. Temporary exhibitions, leisure time and the children are the main reasons for the visits meanwhile the first time visitors come to see the institute itself as sight-seeing, too. Highly educated people are slightly over-presented as visitors compared the whole population of the country. These groups also do have more repeated visits, and so do children. The main information source is “mouth to mouth information”, e.g other people. Over-all satisfactory for the exhibition (understandable, interesting, design, level) is good. The causality of the good feed-back of the guides to other satisfactory is weak, but complicated: no causality can be shown. Summer-time visits are longer, and also the price-quality level is higher inside the visitors staying longer time, especially choosing the Verne-film as a part of their visit. Inter-activeness of the exhibits was the main positive feed-back of the visitors.