The sun's energy comes from thermonuclear fusion reactions. Because the sun's gravity is so strong, hydrogen atoms fuse together to form helium. When they do so, they release a tremendous amount of energy.
A:The sun is hot due to the nuclear fusion process taking place within it, which is called stellar nucleosynthesis. The enormous amount of energy released by this process, nearly 383 billion megawatts multiplied by one billion, produces the sun's incredible heat.
A:The sun holds the planets in their orbits, makes life possible on Earth and converts hydrogen into helium. The sun is a large ball of gas that is undergoing a thermonuclear reaction, which enables it to bathe the solar system in energy.
A:The sun's energy comes from thermonuclear fusion reactions. Because the sun's gravity is so strong, hydrogen atoms fuse together to form helium. When they do so, they release a tremendous amount of energy.
A:A solar radiometer is a device that accurately measures the sunlight's intensity, according to NASA. Simple mercury thermostats were used to measure sunlight many years ago, but these have been deemed untrustworthy.
A:In terms of radius, the Sun is about 109 times larger than Earth. The diameter of the Sun is approximately 864,948 miles while the diameter of Earth is only 7,926 miles. It is necessary to line up the Earth end-to-end 109 times to fit across the length of the Sun.
A:The sun is important to Earth because it warms the seas, generates weather patterns, stirs the atmosphere and provides energy to growing plants. The plants are responsible for providing oxygen and food for life to exist on Earth, according to the U.S. National Aeronautics and Space Administration.
A:The Coriolis effect is caused by a combination of the inertia of moving air and the rotation of the Earth. Air tends to move from high pressure to low pressure in a straight line, but the rotation of the Earth means that, to an observer at one spot on its surface, the moving air appears to turn. This effect increases as the air moves faster.
A:The three layers of the sun's atmosphere are the chromosphere, the transition layer and the corona. The corona is both the outer layer and the hottest layer of the atmosphere, as it can reach 2 million degrees Fahrenheit.
A:According to CNN, a solar eclipse is only a total eclipse for those areas of the Earth directly beneath the moon's shadow. Since the moon is much smaller than the sun or the Earth, it may only completely block the sun's light over part of the Earth's surface. Anyone outside this full shadow may see a partial eclipse, but it will not achieve totality.
A:The ultimate source of energy for living things is the Sun. Plants and other photosynthetic organisms take the energy from sunlight to make glucose. This energy passes to other organisms through the food chain.
A:The surface temperature of the sun is about 5,800 kelvins. The temperature at the core of the sun is at least 15,000,000 kelvins. Most of the sun's constituent particles at the surface are gaseous atoms, as no liquid or solid can exist at such high temperatures.
A:The sun produces energy through nuclear fusion. The sun is a large ball of hydrogen and helium undergoing constant nuclear fusion, in which atoms of hydrogen combine to form helium and release a large quantity of energy.
A:In elemental terms, the sun is made up of 74 percent hydrogen, 24 percent helium and 1 percent oxygen. The last 1 percent comprises of everything else, which includes carbon, nitrogen, silicon, magnesium, neon, iron and sulfur.
A:Direct sunlight reaches the Earth's surface when there is no cloud cover between the sun and the Earth, while cloud cover causes indirect sunlight to reach the surface. In gardening, sunlight falling directly on the plant is direct sunlight, while indirect sunlight refers to shaded areas.
A:A granule is a cellular feature found on the surface of the sun that is caused by convection currents. Granules are situated atop convection cells, except in areas enveloped by sunspots, that release hot fluid from their interior. This process creates bright spots on the surface that sink inward.
A:Sunlight is one of the two most important climatic factors for ecosystems, according to experts from the University of Illinois Extension. Exposure to sunlight also helps humans synthesize vitamin D, which helps the muscular, skeletal and nervous systems work properly.
A:Because the sun is not a planet, a solar day is undefined. The definition of a solar day is the amount of time it takes for a planet to rotate on its axis before the sun returns to the same spot in the sky.
A:The sun can be described as a yellow dwarf star, about 4.5 billion years old and halfway through its life cycle. Situated at the center of Earth's solar system, the sun is an almost spherical ball of hot plasma with a diameter approximately 109 times greater than Earth's. About 75 percent of the sun's mass is comprised of hydrogen, with the remainder of its mass consisting primarily of helium and much lesser quantities of heavier elements that include oxygen, carbon and iron.
A:The temperature at the sun's surface is approximately 10,000 degrees Fahrenheit. Moving towards the core of the sun, the temperature increases significantly to about 27,000,000 degrees Fahrenheit. Pressure at the core is also extremely high.