yes these are the examples
at the turn of the 20th century society was interested in pseudoscientific topics such as clairvoyance and telepathy. to establish the young field of psychology as a science, the early psychologists focused on behavior and mental processes that could be observed directly. by adopting an empirical approach, with its emphasis on direct observation and experimentation for answering questions, early psychologists were able to divorce psychology from pseudoscience
C: circular.
The Hubble sequence is a form of classification of galaxies invented by Hubble in 1926. The sequence divides galaxies into three main categories: lenticular, elliptical and spiral. There is a fourth category that is called irregular, where there are the galaxies that do not fit the characteristics to be included in the three previous categories.
This categorization is the most used even today by both amateurs and astronomers.
