The first observer who reduced the apparently chaotic diversity of stellar spectra to order was Secchi, who showed that they might all be grouped according to four types.
This important observation encouraged him to procure better instrumental means with which to continue the work, and he succeeded in distinguishing the chief characteristics of the various types of stellar spectra.
The spectra have been produced by placing in front of the telescope a large prism, thus returning to the method originally employed by Fraunhofer in the first study of stellar spectra.
This arrangement provides great advantages in the comparison and classification of stellar spectra.
Father Secchi of the Vatican Observatory proceeded at once with the visual examination of the spectra of hundreds of the brighter stars, and he was the first to provide a classification of stellar spectra.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "stellar spectra" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
