still shining in its main sequence, a main sequence star
The sun is about half-way through its life in its current phase as a main sequence star
, and about 5 billion years from now, it will expand into a red giant star.
At this stable stage in a star's life cycle, it is known as a main sequence star
and it will spend most of its life in this way.
This causes the two stars to spiral ever closer together until they reach the point where gas starts to leak from the main sequence star
through the inner Lagrangian point of their combined gravitational field onto the white dwarf, because the larger star has now filled its Roche lobe.
This revealed that the starlight from the foreground lens system was too faint to be a main sequence star
, but it had the brightness expected for two closely orbiting red dwarf stars.
One star in the system might come to the end of its life cycle while the other remains as a stable main sequence star
(like our Sun).
As a consequence of the Einsteinian general theory of relativity, a main sequence star
, at the end of its evolution, will become, in terms of its mass, one of the follows: a dwarf, a neutron star, or a stellar black hole.
5]) Aurigae, is a G-class main sequence star
similar to our Sun and lying only 55 light-years from Earth.
This is not how stars like KIC 8462852, which is an F-type main sequence star
, are expected to behave.