Abstract
I would like to trace the evolution of the major problems or questions since the 1950’s by showing several diagrams (Fig. 1a-e) based on my own recollections. As for the coordinates of the diagrams, the latitude towards North indicates the magnitude of surprise and that towards the South indicated is the deepening of our knowledge. Of course such a visual approach is incomplete and is full of personal prejudices, and many important subjects and considerations may be missing.
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© 1990 Springer Science+Business Media Dordrecht
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Oda, M. (1990). Evolution of the Unsolved Problems. In: Kondo, Y. (eds) Observatories in Earth Orbit and Beyond. Astrophysics and Space Science Library, vol 166. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3454-5_58
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DOI: https://doi.org/10.1007/978-94-011-3454-5_58
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