The Life of Sun: Our Nearest Star and Energy Source

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 The sun, our closest star and source of much of the energy that sustains life on Earth, is perhaps more fascinating than you realize.  In fact, it has its own life cycle that enables humans to observe on Earth and in space through telescopes.  Understanding this life cycle will deepen your understanding of the sun and its role in sustaining life as we know it!  Here's what you need to know about the life of the sun from birth to death ...

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 In his lifetime, a star can take many different forms.  We know that stars have been formed from the compression of interstellar dust since at least 1917.  In 1939, we also discovered that after a period of time as a red giant, stars go through rapid nuclear fusion to turn into white dwarfs - the final stage of their lives before turning.  Black dwarf or disappearing completely.  However, according to a recent study published in The Astrophysical Journal, there may be an additional stage between the red giant and the white dwarf.  This proposed new phase is called yellow because it occurs when the radius of a star becomes 100 times greater than that of our Sun but cannot become supergiant with 1,000 times the radius of our Sun.

 How far is the sun?

 The sun is 93 million miles away from the earth.  The closest star to Earth without our Sun is Proxima Centauri, which is 4.2 light-years or 25 trillion miles away.  Although it helps to understand how far our nearest star is to our planet, it helps to understand why it doesn't take long for light to reach us - which was one of Newton's first observations about the star (he did not believe that everything in space is a single point  Was located).  There is an answer to what stage the sunlight is currently on as it travels toward the earth.

 How hot is the sun?

 The temperature at its center is about 27 million degrees Fahrenheit.  The Sun is classified as a yellow dwarf star, which means its surface temperature is about 10,000 degrees Fahrenheit, but because it is so huge it is much hotter at its center.  The cool star is called the red dwarf;  They are smaller than our Sun, hot stars are thought to be blue giants.  Some scientists believe that red dwarfs burn at a temperature of about 3,700 degrees Fahrenheit in their core.  While our sun may be one of the hottest burning objects in our solar system, it is nowhere near being the largest.  This honor goes to Eta Carinae - a blue giant that weighs about 100 times as much as our Sun and can be 50-100 times brighter.

 Solar bicycles and solar flares

 It takes about 25 days for light to come from our sun to the earth.  How far is it!  The closest star to Earth is actually Proxima Centauri, a red dwarf in a four-star system about 4.25 light-years from us.  One light-year is about 6 trillion miles, which means that at its closest, our solar neighbor would be about 30 trillion miles away.  In that sense, Pluto is 5 billion miles (about 8 billion kilometers) from Earth - about 20 times farther from Proxima Centauri!  In fact, our other neighbors (Alpha Centauri A and B; Sirius; etc.) are on average hundreds of trillions of miles away.

 Gas in the atmosphere

 The life cycle of a star is determined by its mass.  Small stars like our Sun have been burning for about 10 billion years, fueled by the hydrogen gas created in their cores.  This creates heat pressure from the originally-produced gases, which pushes outwards in all directions সহ including upwards — until it balances with gravity.  As long as there is this fuel, at least, our sun will continue to shine brightly in our sky.

 Surface temperature

 The surface temperature of our sun is about 5,500 degrees Celsius (9,900 degrees Fahrenheit).  At this temperature it is illuminated with a bright yellow color, which is easily seen during a total solar eclipse.  A total solar eclipse occurs when the Earth passes directly through the Sun and its satellites.  When this happens, the earth prevents sunlight from reaching the surface of our planet.  But sunlight consists of more than just visible light;  There are also some wavelengths that we can see with our eyes.  This wavelength reaches us as infrared radiation.  During a total solar eclipse you can use infrared cameras to detect radiation from hundreds of different locations across our Sun's atmosphere called particles in both hemispheres at once.

 Deeper down

 The Sun — or, more specifically, the nuclear fusion reaction at its center — for about 4.5 billion years (give or take), has made it one of the oldest neighbors on Earth.  It shines as a star in a group called The Milky Way, our closest solar system neighbor.  It is currently in the 5th stage of its life cycle (described below).  Over time, this will continue to change over time until hydrogen runs out of fuel - which is estimated to occur between 5 and 7 billion years from now.  This may seem like a long time but when you consider that Homo sapiens has been around for about 100,000 years or more ... well, you do the math!

 What is nuclear fusion?

 Nuclear fusion occurs when two small atoms combine to form a larger one.  It is caused by the intense heat, pressure and gravity of the star.  The sun uses nuclear fusion to release its energy.  Every second, millions of tons of hydrogen are converted to helium which generates a lot of energy.  But atomic fusion is different from atomic fission where atoms split to express energy.

 Photovoltaic cells

 Every living thing on earth is dependent on photosynthesis.  In nature, sunlight is absorbed by chlorophyll and other plant pigments, which convert light into energy that fuels every biological process.  People have used solar energy for centuries, using condensed sunlight to evaporate water and steam for cooking or heating ovens to make bread.  Now, we use photovoltaic cells to convert sunlight into electricity that can be used to power everything from space probes to digital devices.  Just as every creature in nature has a unique life cycle, so do we have stars আসলে in fact, learning about its life cycle will help you understand your own better.

 Cost efficiency of renewable energy sources compared to fossil fuels

 Renewable energy sources have become an increasingly popular alternative to fossil fuels.  There are many reasons why people choose them, but it is important to remember that they are not as expensive as sunlight.  It's free and available in all forms, so there's no up-front cost or future cost  Solar panels can be very expensive to buy initially, but even if you consider the cost of maintenance over time, they can still outperform any other source of renewable energy in terms of price tag.  When using renewable solar energy sources like solar or wind energy, keep in mind that your savings will increase over time because you don’t have to pay more than what you already have - the sun forever!  Also, many governments offer tax incentives to those who choose sustainable energy sources which further reduces their operating costs.  So if you are looking for a lot of clean energy, look no further than our nearest star.
 Control of ozone layer pollution by greenhouse gases: As one of its primary missions, NASA tracks ozone layer pollution through its Total Ozone Mapping Spectrometer (TOMS) instrument on its Nimbus 7 satellite.  TOMS is a spectrometer that measures the amount of ozone in a given area by measuring ultraviolet radiation from sunlight.  TOMS has found that CFCs are responsible for 20% of the chlorine in our atmosphere, which contributes to 90% of all man-made ozone depletion.  In addition to its role as ozone depleting, CFCs are greenhouse gases that contribute to global warming.  The Montreal Protocol was passed in 1987 with the goal of reducing the emissions of CFCs and other harmful chemicals into our atmosphere by 50% by 1999;  However, it was not until 1996 when scientists confirmed that they had succeeded in restoring the stratospheric ozone layer.

 Renewable solar energy

 Solar energy is, without a doubt, the most important renewable energy source on our planet.  It has been used for thousands of years, even in prehistoric times.  And today, more people are living in areas with a lot of solar resources than ever before - which means using renewable energy from solar panels as a source of energy is much more practical than ever.  The way we used solar energy then is very similar to the way we do it now.  In fact, ancient cultures used their understanding of how sunlight affects water to create steam to drive turbines - it was one of mankind's first uses of renewable solar energy!  Today we rely on photovoltaic (PV) panels made from silicon crystals that convert sunlight into electricity.

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 Geothermal Power Plant

 Geothermal power plants pump hot water from deep into the earth to run turbines that generate electricity.  When they are not being used to produce energy, they are used as heat sources for homes and businesses.  Geothermal clean, inexpensive and durable.  Unfortunately, this only works in certain areas.  The United States has great geothermal potential;  However, it is concentrated mostly in its western part (Alaska), Hawaii, and a small part of the whole of California - where most people live (California).  There are limited sites where you can develop geothermal resources, says Dr. Nir Shaviv, a professor at the Hebrew University of Israel in Jerusalem.  Geothermal energy is ultimately a negligible contributor to our global energy needs.