The Sun is mostly made up of a hot plasma of hydrogen and helium gases and creates energy by thermonuclear fusion at its core. This energy is then radiated out from the core and into the solar system as heat and light.
The Sun is mostly made up of a hot plasma of hydrogen and helium gases and creates energy by thermonuclear fusion at its core. This energy is then radiated out from the core and into the solar system as heat and light. Earth, in fact, only intercepts a very small amount of this energy.
Earth receives its energy as incoming short-wave solar Sun radiation. This moves downward through the atmosphere interacting with each of its layers and their components, reducing the final energy amount that reaches the surface.
Some of the energy is reflected back into space. The global heat budget is the usable energy maintained by the Earth as a balance between energy received by the planet input and that which is radiated back out into space output. This balance of energy powers the atmospheric system, ocean currents, and climates which allow life to be sustained within the biosphere.
The rate of emission by the sun can vary over time. Although in a relatively stable condition as it should be for around 3 billion years the Sun has periods when it emits additional energy and others when it appears less active.
Extra activity on the Sun can result in huge magnetic storms called Essay on the sun for kids that appear on its surface as darker patches.
Periods of high sunspot activity result in increased brightness and more energy being released by the Sun and received by the Earth.
Alternately, the cycle of brightness has a dimmer sun where there are very few sunspots. Some scientists have linked the so-called Little Ice Age with a period of very low sunspot activity known as the Maunder Minimum which ran between and The sun is estimated to have been around 0.
It would be wrong, however, to suggest that the Maunder Minimum caused this phenomenon as the little ice age started from around and blasted to approximately The Maunder Minimum does coincide with the coldest part of the Little Ice Age and may have played an aggravating part in this however more evidence is appearing to suggest that this was not a global event.
The Maunder Minimum saw a larger than expected number of cold winters in Europe but this was not experienced throughout the world and some locations even higher temperatures. At present average sunspot activity appears to be in decline and when compared to evidence from ice core samples this appears to be at a much faster rate than has been seen in the last years.
If this continues Maunder minimum conditions would be reached within 50 years. For some this would suggest a return to much colder conditions and global temperatures should already be showing reduction.
This is not happening and raises three possibilities: Viewing the energy from sunspot activity as inputs to, or fuelling, the climate generation system rather than merely heating up the planet could provide a better explanation for the process and an explanation for the different regional experiences.
Each level of the climate system adapts to this input, adjusts and even alter sits output which then has a knock-on effect on each of the following levels. Due to this it is more difficult to predict or attribute the influence of altering solar emission. One theory, based on this more complex understanding, is that the changing level of ultraviolet light from the Sun ultraviolet radiation levels surge during high sunspot activity leads to an alteration in temperature distribution and winds in the stratosphere.
In the Northern hemisphere this results in disruption of the jet stream and, as a consequence, colder air moves southwards over Europe and is held in position for much longer periods.
This would explain the more regional effects previously observed. Since the s scientists have been able to monitor solar output much more accurately and without the interference of the atmosphere. This is due to monitoring by satellites. Solar output has remained relatively constant and has not shown a net increase in the last 40 years and so cannot be responsible for the global warming observed.
By using sunspot records the level of solar activity can be estimated for a longer period. These records suggest that in the 20th century solar activity increased until the early s but has decreased since.
This evidence would allow some to infer that solar output could have influenced global temperature rises up to the s but the decrease since then should have signalled a cooling. This has not happened and temperatures continue to rise.
If solar activity was driving global warming it would be expected that a uniform temperature increase would be found in each level of the atmosphere. Radiosonde balloons and satellites have provided extensive data which suggests that although the lowest layer of the atmosphere troposphere is experiencing warming the stratosphere is in fact cooling.Short Essay on Sun.
Article shared by. The sun is a star.
It is the star round which the earth and other planets revolve. In a way, we can say that sun is the head of solar family or solar system. Compared with the millions of other stars, the sun is a medium sized star and of average brightness.
The sun appears to be larger and brighter. The Sun in the center of our solar system is a yellow dwarf star. It gives off energy as light.
That includes light, infra-red energy (heat), ultraviolet light and radio waves. It also gives off a stream of particles, which reaches Earth as "solar wind". Sun information for kids Information about the Sun's formation, composition, statistics, and eventual demise suitable for young astronomers.
Photo Credit: Duncan Walker. Short essay for kids on The Solar System. The Solar System consists of nine planets, of which the Earth is one, and the star in the centre is called the Sun. This Solar System is tucked away in a corner of the Milky Way, at a distance of about 30, light years from the centre of this galaxy.
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10 sample one paragraph essays for kids (free to read) Sowmya Advertisements: Teachers, who spend their lives teaching kids, do more than just to teach.
They help the students shape the future of their community's cities and countries. 4. Rainy Day. I am Sunidhi Mishra. I study in Class II Norte Dame Academy, Delhi.