Resultado da Busca
16 de set. de 2020 · Low-mass stars. The Solar Dynamics Observatory captured this ultraviolet view of our Sun from its orbit around Earth. NASA's Scientific Visualization Studio/SDO. A low-mass star has a mass eight times the Sun’s or less and can burn steadily for billions of years.
List of the smallest stars by star type. The red dwarf stars are considered the smallest stars known, and representative of the smallest star possible. Brown dwarfs are not massive enough to build up the pressure in the central regions to allow nuclear fusion of hydrogen into helium.
More massive stars must burn fuel at a higher rate to generate the energy that keeps them from collapsing under their own weight. Some low-mass stars will shine for trillions of years – longer than the universe has currently existed – while some massive stars will live for only a few million years.
Low-mass stars are the longest lived of the energy-producing objects in the universe. Though they far outnumber all other stars, they are the faintest ones, and thus are hard to detect. Some low-mass stars will live for trillions of years.
While massive stars and their final stages dominate the energy input into the interstellar medium, low-mass stars constitute most of the total mass in our galaxy. It is generally accepted that stars form by the gravitational collapse of cold, dense, and dusty molecular cloud cores.
Low-Mass Stars fuse hydrogen into helium, the proton-proton cycle. The classic low-mass star is the Sun. Low-mass stars have large convection zones when compared to intermediate- and high-mass stars.
Key Ideas. Low-Mass Star = M < 4 Msun. Stages of Evolution of a Low-Mass star: Main Sequence star. Red Giant star. Horizontal Branch star. Asymptotic Giant Branch star. Planetary Nebula phase. White Dwarf star.
