Helium burning is most durable stage in stellar evolution.
The first stage of stellar evolution is nebula.
The longest stage of stellar evolution is the main sequence phase.
Main Sequence
I know of no star by that name.
Our Sun is currently on the Main Sequence stage of it's evolution.
The main sequence stage is a point in the stellar evolution of stars in the universe at which every star converts hydrogen into helium in its cores and releases huge amounts of energy.
Type II supernova. Formation of a neutron star or black hole.
In G-type stars, this would be the white dwarf stage. More massive stars could continue to fuse ever heavier elements, until the fusion products consist mainly of iron, and the stellar core collapses into a neutron star or a black hole.
Dialga has no evolution stage.
The first stage in boundary evolution is: '''definition.''' [Not delimination] >:-(
stellar nebula
A white dwarf is the last stage of stellar evolution for stars with masses similar to our Sun. A black hole, on the other hand, is the last stage of stellar evolution for stars having very large masses, many times greater than that of the Sun. Consequently, very few stars end up as black holes. Additionally, black holes have an escape velocity greater than the speed of light, while a white dwarf's escape velocity is less than the speed of light.