-stars, which astronomical investigations compel us to regard as being of particularly great mass.
A general shift of the spectra towards the red is exhibited with considerable certainty.
2. It follows from a comparison of the displacement of the lines of the star-spectra that the above displacement which was found by a statistical examination is not an ordinary Doppler effect, but is due to the conditions of emission of light at the surfaces of the stars.
3. The close connection of the
- and
-stars with nebulous matter in the heavens is a symptom that these stars are of great mass.
4. If we regard the fixed calcium lines in the spectra of