At the beginning of the end of a star’s life, its core runs out of hydrogen to convert into helium
The energy produced by fusion creates pressure inside the star that balances gravity’s tendency to pull matter together, so the core starts to collapse
On the right of the illustration is the life cycle of a massive star (10 times or more the size of our Sun)
Like low-mass stars, high-mass stars are born in nebulae and evolve and live in the Main Sequence
However, their life cycles start to differ after the red giant phase
A massive star will undergo a supernova explosion
To get a colorful step-by-step overview of the life cycle of stars, examine the site "The Life Cycle of Stars" which is located on the World Wide Web
The URL for this site is
Catalysed fusion reactions by which stars convert hydrogen to helium
?times as massive as the Sun.
Stellar classification
?K.Tables VII and VIII. This temperature range gives the F-type stars a whitish hue when observed by the atmosphere.Because a main-sequence star is referred to as a dwarf star
This class of star may also be termed a yellow-white dwarf.Notable examples include
