All stellar objects give out a wide range of wavelengths of electromagnetic radiation but each object gives out more energy at one particular wavelength.
The wavelength of this peak wavelength is related to the temperature of the object.
Hotter objects have a shorter peak wavelength than cooler objects.
Peak wavelengths allow the temperature of stellar objects to be calculated.
Hotter objects also emit more radiation per unit surface area at all wavelengths than cooler objects.
Stars are formed in interstellar clouds when gravitational forces overcome thermal pressure and cause a molecular cloud to contract until the core becomes hot enough to sustain nuclear fusion which provides a thermal pressure that balances the gravitational force.
<aside> 💡 The mass of a star will determine its lifetime.
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Every star will eventually become:
The mass of the star will determine its eventual fate.