For Us, the sun is the provider of Energy; The Provider of Life

Helios the Greek Sun-God Ra - Egypt Indian - Surya Celtic The SUN has been treated as God over the ages

Now Astronomers have studied it with various telescopes. The best way to view the Sun with a small telescope

Now Astronomers have studied it with various telescopes. This is how it is seen by Solar Astronomers

We now know that …

The Sun is a Closeby Star

The Sun is Huge 1.4 Million Kilometers

The Sun is composed mostly of extremely hot Hydrogen

More details about the SUN It is 13,00,000 times the Earth in Volume A 109 Earth can be places end to end along its diameter It is 149,600,000 km from the Earth hence, its light takes 8.24 minutes to reach us Because of this it appears to cover only half a degree in sky It emits all the radiations in the Electromagnetic spectrum (Gamma Rays to Radio waves)

Scientifically we are still trying to know about the sun.

Internal Structure of

Structure Hot Dense Core: Fusion happens here Radiative Zone: Energy carried by photons Convective Zone: Energy carried by convection

Photosphere and Corona The visible surface Hot thin atmosphere

Most of what we know comes from Astronomical observations using various kinds of Telescopes. Let us view it at differing Zoom levels.

A picture of the SunSunspots Here we see the Photosphere! Some special features, called Sunspots, are also seen.

Let us Zoom in The surface temperature of the Sun is 5600 degrees centigrade Sunspots are dark spots on the surface of the Sun where the temperature is lower than the surrounding areas.

Let us Zoom in Surface Granulation

Let us Zoom in A Prominence is a large, bright, gaseous feature extending outward from the Sun's surface, often in a loop shape. These also indicate the nature of magnetic fields on the Sun.

Let us Zoom in The Magnetic loops can sometimes break, and cause huge eruptions of hot Plasma from the Sun's surface. These are called Solar Flares

Solar Flares can rise through the Chromosphere into the Corona

The Corona The Corona is very dim to be seen in comparison with the rest of the Sun. But it can be seen during a Total Solar Eclipse

Coronal Mass Ejections Astronomers can cover the Sun in their telescopes to cause an artificial eclipse and see the eruptions clearly.

The Coronal Mass Ejection & other ejections from the Sun go outward in the Solar system and is called the Solar Wind Solar Wind

Fast moving solar wind hitting the sensors of the SOHO, which observes the Sun from Space.

Space Weather Some conditions in space have the potential to seriously affect us on Earth. We call these conditions "space weather". The causes can include radiation “storms“ and some ejections from the Sun.

Seen from the Ground Aurora

Aurora Seen from Space

The Sun-Earth connection All our energy comes from the Sun! The Sun has E=mc 2 as its source of energy.

Nuclear Fusion When 4 hydrogen nuclei are fused together into 1 helium nucleus, energy is released in the form of Light photons and particles called neutrinos. Energy from Sun

Earth’s Budget Energy from Sun

Efficient use by Plants

Using what we have, properly Solar Cookers Solar Heater Solar Lighting

Solar Cycle Periodic changes are seen in the number of Sunspots.

Solar Cycle This is indicates by changes in the sun's appearance and by changes seen on Earth, such as auroras.

Solar Cycle Solar cycles have an average duration of about 11 years. They have been observed for hundreds of years.

The Sun-Earth connection This does not affect the earth in anyway!!! It is simply a play of shadows.

Life Cycle of Sun & Possible end

Solar System

The Sun’s Family

Heliosphere

Beyond the Solar System

Sunsauya 50,000 light years Milky Way - AakaXagaMgaa

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