What name is given to the cooler areas of the Sun's surface that are visible as dark patches?
Sun called sunspots and in solar prominences. The magnetic field also varies in time and location. The quasi-periodic 11-year solar cycle is the most prominent variation in which the number and size of sunspots waxes and wanes. Sunspots are visible as dark patches on the Sun's photosphere, and correspond to concentrations of magnetic field where the convective transport of heat is inhibited from the solar interior to the surface. As a result, sunspots are slightly cooler than the surrounding photosphere, and, so, they appear dark. At a typical solar minimum, few sunspots are visible, and occasionally none can be seen at
Dark Is the Sun Dark Is the Sun Dark Is The Sun is a science fiction novel by American writer Philip José Farmer, first published in 1979. It tells the story of the people and creatures left on Earth when the Sun is dead and the universe is heading towards the Big Crunch. By the year 15 billion AD, Earth's species have evolved to the point of being super selected to a purpose. Every form has a sentient representative: animal, plant, and mineral. Pairing of sentient beings, including humans, is controlled by the use of "Soul Eggs" which are given shortly after birth, worn