white dwarf/nova
WHITE DWARF ;p
Yes, a red giant is a stage in the life cycle of a star where fusion reactions are occurring in its core. The core of a red giant star typically consists of helium undergoing fusion into heavier elements like carbon and oxygen.
Before a star becomes a red giant, it goes through the stage of being a main sequence star, where nuclear fusion in its core converts hydrogen into helium, releasing energy in the form of light and heat.
An expanding star after exhausting its hydrogen fuel is called a red giant. This stage occurs when the core contracts and heats up, causing the outer layers of the star to expand and cool, giving it a red color.
The next stage in the Sun's evolution is the red giant phase. This occurs when the Sun runs out of hydrogen fuel in its core and starts burning helium. During this phase, the Sun will expand and become larger, eventually engulfing Mercury, Venus, and possibly Earth.
red giant
red giant
This happens when a main sequence star uses up all of its fuel and swells. Next stage: Red Giant.
The sun's red giant stage will last for 1 or 2 billion years.
The sun will swell into a red giant star during its helium fusion stage. This stage occurs when the core contracts and heats up, causing the outer layers to expand and cool, giving the star its red appearance.
12 billion years.
A star that has exhausted its hydrogen supply is called a red giant or a red supergiant, depending on its initial mass. This stage occurs when the star begins to fuse heavier elements in its core, leading to its expansion and eventual evolution into a white dwarf, neutron star, or black hole.