Mass and size
Ultimately the mass a star has at the end of its life depends on its initial mass. This mass determines what stages a star will go through in its death throws.
The life cycle of a star is determined primarily by its mass. The hotter a star the bluer its color. The difference between apparent brightness and luminosity is that luminosity is a good indicator of the energy output of a star.
Binary stars are ideal to determine the mass of the components.
The Hertzsprung-Russell diagram was a valuable tool for helping astrophysicists work out the stellar life cycle. Arrange all the stars by color (frequency) from left to right, with the bluest on the left and the reddest on the right. Then sort these all by size from top to bottom, with the largest on top. Subrahmanyan Chandrasekhar was an astronomer from India who determined the process of how stars form, shine, age, and die, and was awarded the Nobel Prize for his work on that subject.
stellar parallax
the answer is a protostar
A star's "life cycle" depends mostly on its initial mass; everything is determined by mass. Small, low-mass stars may shine essentially forever, while very large high-mass stars may grow old and go supernova in only a few dozen million years.
A star's color is determined by its surface temperature. This temperature is largely dependent on the star's initial mass.
Massive stars get hotter, burn their fuel faster, and therefore live shorter.With respect to their "death": Stars of "normal" mass become white dwarves; more massive stars become neutron stars, and the most massive stars become black holes.
Ultimately the mass a star has at the end of its life depends on its initial mass. This mass determines what stages a star will go through in its death throws.
The life cycle of a star is determined primarily by its mass. The hotter a star the bluer its color. The difference between apparent brightness and luminosity is that luminosity is a good indicator of the energy output of a star.
White stars are usually the hottest, followed by blue stars and then red stars.
the answer is a protostar
Hipparchus
Binary stars are ideal to determine the mass of the components.
Stellar parallax
They followed the stars