A star is considered a star as soon as it’s large enough to initiate and sustain nuclear fusion in its core. There is a minimum mass for this.Stephenk53 said:I have two questions, firstly, when a star first forms is there a most common type it starts its life as? Such as when it is first big enough to be classified as a star is it usually say a brown dwarf?
Secondly, Is there a type of star that is best for a planet to form life?
Stephenk53 said:I have two questions, firstly, when a star first forms is there a most common type it starts its life as? Such as when it is first big enough to be classified as a star is it usually say a brown dwarf?
Secondly, Is there a type of star that is best for a planet to form life?
Stephenk53 said:...Such as when it is first big enough to be classified as a star is it usually say a brown dwarf?..
Stephenk53 said:...
Secondly, Is there a type of star that is best for a planet to form life?
Stars form when a large cloud of gas and dust, called a nebula, collapses under its own gravity. This usually happens when the cloud reaches a critical mass, which can be triggered by a nearby supernova explosion or the collision of two smaller clouds.
The formation of a star is determined by the mass, temperature, and composition of the nebula. A higher mass and lower temperature typically result in the formation of larger, longer-lived stars, while a lower mass and higher temperature may produce smaller, shorter-lived stars.
Stars can form in any location where the conditions are suitable, such as in galaxies, nebulae, and even within our own solar system. However, the majority of stars are found in galaxies, where there is an abundant supply of gas and dust for star formation to occur.
The time frame for star formation can vary greatly, from a few hundred thousand years to several million years. The exact duration depends on the size and mass of the nebula, as well as other environmental factors that may affect the collapse and formation of the star.
The type of star best for supporting life is a main sequence star, like our sun. These stars have a stable energy output and a long lifespan, providing a consistent and stable environment for potential life to develop and thrive. Other factors, such as the distance of the star from its planet and the planet's atmosphere, also play a crucial role in determining the habitability of a star system.