Red giants are huge stars, roughly 70 times as large as the Earth's Sun, yet with a helium core only a few times larger than the Earth, or about 1/10,000 the size of the star. With the lack of nuclear fusion in the core, the gas pressures allow gravitational forces to compress the helium to high densities, such that about 25 percent of the star's mass exists within the core, and the density rises to about 1,000,000,000 kg per cubic meter. strong stellar winds in this stage blow away a significant part of the star's mass, typically 20-30 percent of the original mass.
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Preparing for Armageddon, Natural Disasters, Nuclear Strikes, the Zombie Apocalypse, and Every Other Threat to Human Life on Earth. Most of us have thought about how we would handle various types of scenarios that could signal the end of the world. There are plenty of movies on the subject, psychological papers, and even survivalists that are part of reality TV shows. Perhaps you have had dreams about being one of the few left and what you would do in order to survive.