They form in areas of strong magnetic activity that inhibit heat transfer. The Sun’s surface area is 11,990 times that of the Earth’s. Articles from Britannica Encyclopedias for elementary and high school students. The color of the sun was creamy yellow, and it was easy to distinguish it from the light blue color of the sky. The Sun is a main-sequence G2V star (or Yellow Dwarf). (G stars are so called because of the prominence of a band of atomic and molecular spectral lines that the German physicist Joseph von Fraunhofer designated G.) The Sun exists in the outer part of the Milky Way Galaxy and was formed from material that had been processed inside a supernova. The Sun is all the colours mixed together, this appears white to our eyes. The sun was a … The Sun is 109 times wider than the Earth and 330,000 times as massive. The Sun is composed of hydrogen (70%) and Helium (28%). The Sun gives us light. Sun, star around which Earth and the other components of the solar system revolve. Under the force of gravity, the great mass of the Sun presses inward, and to keep the star from collapsing, the central pressure outward must be great enough to support its weight. The sun formed more than 4.5 billion years ago, when a cloud of dust and gas called a nebula collapsed under its own gravity. By comparison, Proxima Centauri, the next closest star to Earth, is 250,000 times farther away, and its relative apparent brightness is reduced by the square of that ratio, or 62 billion times. Updates? The Sun is a main-sequence G2V star (or Yellow Dwarf). 5) Sun orbits the solar system at the speed of 820,000 km an hour. The Sun is a star like many others in our Milky Way galaxy. Our modern day calendar is based on the earth’s movement around the sun. The density at the Sun’s core is about 100 times that of water (roughly six times that at the centre of Earth), but the temperature is at least 15,000,000 K, so the central pressure is at least 10,000 times greater than that at the centre of Earth, which is 3,500 kilobars. The energy produced by the Sun is essential for life on Earth and is a driving force behind the Earth’s weather. Ancient sun worshippers believed the sun died at the end of the winter solstice and then three days later it would be reborn at the start of its cycle - December 25. The mass of the Sun, M☉, is 743 times the total mass of all the planets in the solar system and 330,000 times that of Earth. Sunspots are areas of the Sun’s surface that appear darker than the surrounding areas, this is because they are cooler. The one Christians know as Jesus was actually a symbol for the sun. The Sun is all the colours mixed together, this appears white to our eyes. Premium Membership is now 50% off! different grouping of words, you can write the following: I sat down by a glass-clear lake. The sun was high up in the sky spreading its rays everywhere trying to touch every object around. All the interesting planetary and interplanetary gravitational phenomena are negligible effects in comparison to the force exerted by the Sun. It has existed for a little over 4.5 billion years. Please select which sections you would like to print: Corrections? The Sun is the source of an enormous amount of energy, a portion of which provides Earth with the light and heat necessary to support life. It is an almost perfect sphere of super-hot gases whose gravity holds the solar system together. The sun … 7) Sun surface temperature is around 5800 K and at the core, it is 15 million degrees. Superposed on this stable star, however, is an interesting 11-year cycle of magnetic activity manifested by regions of transient strong magnetic fields called sunspots. Author of. The sun is a powerful and prominent star in our solar system. Even the sun has a sinking spell each evening. John Lennon. There is a small boat in the distance that is in the exact same path of the sun, which in my view, looks like the sun is sitting right on top of it like cup on top of a saucer. Beyond a distance of 5R☉ from the Sun, the corona flows outward at a speed (near Earth) of 400 kilometres per second (km/s); this flow of charged particles is called the solar wind. The Sun is composed of hydrogen (70%) and Helium (28%). The nuclei of atoms are completely stripped of their electrons, and at this high temperature they collide to produce the nuclear reactions that are responsible for generating the energy vital to life on Earth. The sun was like a celestial fireball in the sky. The Sun is 109 times wider than the Earth and 330,000 times as massive. The Sun is a very stable source of energy; its radiative output, called the solar constant, is 1.366 kilowatts per square metre at Earth and varies by no more than 0.1 percent. But it always rises the next morning. Build Better Writers! The Sun is a star, just like the ones you can see in the night sky, but much, much, much closer. As a result, there is no fixed surface. Save 50% off a Britannica Premium subscription and gain access to exclusive content. Plants make their food with the help of sunlight. The Sun is a type of star called a G-type main-sequence star based on its spectral class. The Sun is classified as a G2 V star, with G2 standing for the second hottest stars of the yellow G class—of surface temperature about 5,800 kelvins (K)—and the V representing a main sequence, or dwarf, star, the typical star for this temperature class. Feedback and revision. 184 Copy quote. The Sun’s surface area is 11,990 times that of the Earth’s. [53]. Intense solar flares can interfere with radio communications on Earth.
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