2015年3月28日 · With a few exceptions, red supergiants go supernova, and red giants don't. Red supergiants leave behind neutron stars or black holes; red giants leave behind white dwarfs. The dividing line between the two is a birth mass of about 8 solar masses.

2012年5月31日 · Plus the amount of fuel available for a red supergiant is significantly reduced after hydrogen burning. Hydrogen fusion turns 4 hydrogen into 1 helium, so there is only 1/4 the amount of fuel once Helium fusion starts.

2005年7月11日 · Red Supergiants are a type of star that are among the largest and brightest in the universe. They are typically 10 to 20 times more massive than our sun and can be up to a billion times larger in size. What is the lifespan of a Red Supergiant? The lifespan of a Red Supergiant varies, but on average they can live for about 10 million years.

2024年10月30日 · A red giant forms after a star has run out of hydrogen fuel for nuclear fusion, and has begun the process of dying. A star maintains its stability through a fine balance between its own gravity, which holds it together, and the outwards pressure from ongoing thermonuclear fusion processes taking place at its core.

2019年11月12日 · For a star with a mass 8 times greater than the sun, it will take around 100 million years to become a red supergiant. What happens to a star after it becomes a red supergiant or red giant? After a star becomes a red supergiant or red giant, it will continue to fuse heavier elements in its core until it can no longer sustain nuclear reactions.

2023年5月27日 · They fixed it with a search and replace, adding "super". I'm not sure that it is the nearest red supergiant to Earth. Antares is at about the same distance (5.9 mas parallax), and Alpha Persei , unequivocally closer, is a supergiant in …

2023年5月25日 · Antares is currently in the red supergiant phase of its life cycle. As it exhausts its nuclear fuel, it will undergo significant changes in temperature and luminosity. The transition to a blue giant involves the shedding of outer layers and a shift in the star's core processes, leading to a hotter and more compact state.

2010年12月31日 · The reason higher mass stars go red giant sooner is because they burn fuel much, much faster than lighter stars, even though they have more fuel to "burn". This is not an exact science and is more based on observations than theory, so any times are merely approximate, not that it matters due to the enormous time scales.

2019年10月21日 · There seems be much understanding of the internal structure the Sun for instance its several layers,thecore, the radiative and convections zones, the corona and so forth. What is known about stars that are not like the Sun? I …

2022年1月6日 · In summary, the first suspicious activity of SN 2020tlf, a red supergiant star in the NGC 5731 galaxy, was noted 130 days prior to its supernova event. This discovery was made by lead study author Wynn Jacobson-Galán, a National Science Foundation Graduate Research Fellow at University of California, Berkeley.