A massive star in the later stage of its life that has expanded and cooled.
A dense stellar remnant primarily composed of neutrons.
A small, dense remnant of a star that no longer undergoes nuclear fusion.
The elliptical path a celestial object takes around another object due to gravity.
A massive, cool star in the later stage of its life cycle.
A neutron star or black hole.
It has expanded and cooled to become a red giant.
Neutrons packed densely together.
It refers to energy levels of electrons in atoms in physics, but to paths of celestial objects in astronomy.
It becomes a planetary nebula and leaves behind a white dwarf.