The sun has had multiple names over the centuries, including the French word "soleil," the Latin term "sol" from the ancient Romans and "helios" from the ancient Greeks. However, after Germany coined the term "sonne," the word translated into English became "sonne" and later just "sun," according to NASA.Know More
As the name for the sun evolved over time, many cultures and countries adopted various versions of the title. The term "sol" was used in Spanish and Portuguese cultures, while Italy used a slight variation on the word, calling it "sole." The "sonne" name from Germany expanded to old Goth and old Norse cultures as well.
It wasn't until about 1610 that any traces of the sun were detected in the form of sunspots. Both Thomas Harriot and Galileo Galilei noticed these sunspots. However, the sunspots later vanished for some time. By around 1860, the sun had a coronal mass ejection, the first that was known in history.
The sun is classified as a G2V star. The "V" portion of this name is due to how brightly that the sun burns off hydrogen. Six different portions of the sun exist in total, including its visible surface, the radiative zone, its chromosphere, its convective zone, its corona (last layer) and its core (the innermost layer).Learn more about Our Sun
The sun is primarily composed of hydrogen and helium. Hydrogen is the most abundant element of the Earth’s closest star, representing 71 percent of its mass. Helium is the second most abundant element in the sun, representing about 27 percent of its mass. Oxygen, carbon, nitrogen, silicone, magnesium, neon, iron and sulfur combine to form about 1 percent of the sun’s mass.Full Answer >
Technically speaking, the sun is, in fact, not a source of inexhaustible energy, since every star eventually burns out. However, the sun's internal fuel supply will keep it burning for at least six billion years, enough to be considered inexhaustible for all practical purposes. The sun's nuclear furnace provides as much as 174 petawatts of solar energy to the planet, approximately 70 percent of which is absorbed by the surface.Full Answer >
The sun formed from a collection of gas and dust that pulled together by mass gravitation; the extreme pressure caused by this great mass produced a nuclear fission reaction that fueled the sun and continues to keeps it burning. The primary elements that make up the sun are hydrogen and helium. Scientists theorize that the shock wave from a large supernova drew together the dust particles that became the sun.Full Answer >
Ultraviolet radiation from the sun is the primary cause of skin cancer, according to WebMD. Sun exposure also accelerates the age of the skin. Dr. Troy L. Bedinghaus notes that sun exposure may result in damage to the eyes.Full Answer >