The helium emission lines of these objects were seen before the discovery of helium, and were therefore thought to be a new series of hydrogen lines.
The helium emission lines of these objects were seen before the discovery of helium, and were therefore thought to be a new series of hydrogen lines. M82, the Antennae Galaxies, and other starburst galaxies contain a very high concentration of them, while over 200 are known in the Milky Way. They are subclassified based on whether their emission lines are dominated by nitrogen or by carbon and oxygen. When these objects are found in binary systems, they are often surrounded by pinwheel nebulae, resulting from their characteristic shedding of their outer layers. Notable examples of these objects include Gamma 2 Velorum. For ten points, what are these supermassive stars named for their two discoverers?
The helium emission lines of these objects were seen before the discovery of helium, and were therefore thought to be a new series of hydrogen lines.
{Wolf-Rayet} (Ray-ay) stars