Sun : The most spectacular view

Here are some most spectacular view of sun and its detail. Lets watch them all,

1) Solar Atmosphere:

We are indeed thrilled when we learnt about the Sunspots that exhibit a cosmic dance with their ever changing shape. The Sun, not only throws a challenge to man forever, but also fascinates. Seen from the Earth the photo-sphere appears to us as the boundary of the Sun. The Sun, which is essentially a huge mass of gas , has no such limitation. There are two more zones above the photosphere. They are called the Chromosphere, which is 10,000 Km thick and the Corona. Corona extends to millions of kilometers and sometimes reaches even the Earth's orbit. In the astronomers terms, these zones are known as Solar atmosphere.

Density of the Zones : As these zones are far away from the centre of the Sun, the gravitational force falls rapidly. The density of the gas also decreases to very low levels. For instance in the photosphere it is about a billion times less(10^-4 kg/m^3) than the density at the photosphere it is about a billion times less(10^-8 kg/m^3) and in the Corona the density is further ten thousand times. Generally when we move away from something hot , we experience the difference in temperature . It is true when we expect the same on Sun, as the zones are far removed from the centre of the Sun. It is not so. The Temperatures rapidly increase across the zones - from about 5800 degree Kelvin at the photosphere to about 10,000 degree Kelvin at the top of the Chromosphere and to more than a million degree in the Cornea. Hence the gas in these Zones is in a highly ionized state. Do these gases emit radiation? Yes, they do, characteristic to their respective temperatures. As they are so weak due to the low density, they are not visible to the naked eye on a normal day against the bright photosphere. However, they are visible , though  for a short duration, during total solar eclipse. When the moon completely covers the photosphere, the chromosphere can be seen as a reddish ring around the darkened photosphere and the Corona as an irregular whitish halo. What happens when the Sun's magnetic field interacts with the hot ionized gases?

When this interaction happens, some of the spectacular events occur that lead to far reaching consequences on Earth. To observe all this even on a normal day, Astronomers developed instruments with the help of which they can study these zones. One such instrument is a fillergram - a type of telescope that allows only a specific coloured light.