About 10 billion years. We are 4.5 billion years in now.
main sequence
main sequence
The Sun is approximately halfway through its main-sequence process of evolution.
protostar, main sequence, giant, nebula, white dwarf & black dwarf.
Vega is a main sequence star. About half way through it's life, but evolving rapidly.
The "main sequence".
main sequence
Main sequence
The main sequence.
Main Sequence.
main sequence
About midway (4.5 billion years) through the main sequence.
hydrogen fusion
How does the life cycle of humans compare to the life cycle of a star? They both have stages where they are born and die which is in the main sequence and supernova and in a human they are born in a womb and die of old age.
A protostar generates energy by friction whereas a main sequence star generates energy by fusion.
A protostar generates energy by friction whereas a main sequence star generates energy by fusion.
The Sun is approximately halfway through its main-sequence process of evolution.