5/21/2023 0 Comments Corona photosphere chromosphereAt this layer, the energy of the sun is released in the form of light. The thickness of the photosphere is 500 kilometres. It is flowing at a velocity of 7 km/second. Granules are cells of plasma that are 1000 km in diameter with hot rising plasma in the centre and the cooler plasma laying in the narrow spaces between them. It is composed of convection cells which are called granules. It is the deepest region of the luminous object. The term photosphere derived from the ancient Greek roots, photos means "light" and sphaira means "sphere" which refers to being a spherical surface. The lowest layer of the sun is the photosphere. So, the photosphere acts as their effective visible surface. In the universe, the stars have no gases but the gas beneath the photosphere is opaque. It is located under the chromosphere and the corona. The lowest visible layer of a star is the photosphere. The photosphere is the external layer of the Sun which is known as the luminous envelope or the visible layer of the sun from which light as well as heat radiate. Out of these, we talk about the main photosphere which is the outer layer of the earth. The inner layer of the sun is the core, radiative zone and convection zone while the photosphere, the chromosphere, the transition region and the corona are the outer layers of the sun. The atmosphere of the sun is composed of different layers and gases. This topic is very much essential in the fields of Astronomy, Geography, and Earth Science. We will learn what is the photosphere, its definition, its features and other related aspects as well. In this article, we will cover one of these layers i.e. Different ranges of temperature can be observed in these layers which have their own significance. It has a different structure consisting of Internal and external structure. Hydrogen and Helium are the two most elements of its composition. The corona also emits X-rays.The Sun is considered as the centre of our solar system which also consists of planets, satellites, etc. Some particles are pulled back towards the Sun while others are so energised that they flow outwards from the corona at high speeds to form the Solar Wind. High velocity solar particles interact with the magnetic field of the Sun. The corona stretches millions of kilometres from the chromosphere and temperatures may reach 2,000,000°K. The Corona does not generate heat as such the high velocity of particles within it is the result of the temperature thought to be due to magnetic fields. It can also be seen using special equipment called a coronagraph. It then appears as a 'halo' surrounding the Sun. We can observe it best during a solar eclipse when the Moon blocks out the photosphere and chromosphere of the Sun. It consists of gases that are expelled from the Sun. The corona is the outmost part of the Sun's atmosphere. The chromosphere can only be very briefly observed at the time of a solar eclipse and then only at the beginning and end of one when observers can detect a thin pink rim around the Sun. The chromosphere extends for thousands of kilometres above the photosphere, although is relatively thin when we consider the size of the Sun. These are circular areas with a thin darker area around them. Features of the photosphere include a process called granulation. Average temperatures are approximately 5,800°K. This is the surface layer of the Sun that we are able to see. Light and heat move through these regions of the Sun, temperatures range from 2,000,000°K to 6,000°K. Temperatures reach over 15,000,000°K at the core where the Sun produces its energy. Structure 10.2 - Know the location and relative temperatures of the Sun’s internal divisions, including:ġ0.3 - Understand the role of the Sun’s internal divisions in terms of energy production and transferġ0.5 - Know the location, temperature and relative density of components of the solar atmosphere, including:
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