Sun and Solar Energy

In this article we will study how the sun is going to die and the importance of solar energy on earth.

Sun is going to die

The European Space Agency’s (ESA) Gaia spacecraft has made a chilling prediction that our sun is sort of midway through its lifestyles span and whilst it reaches the give up, it’ll swell and obliterate our planet – but facts from the craft shows this could not take place for as a minimum another five billion years.

Gaia determined the sun is round 4.57 billion years antique and with the aid of figuring out its mass and composition the device estimated how the solar will evolve within the destiny..

the street to its dying begins around Ten to eleven billion years of age when it turns into a pink large and swiftly will increase significantly in length.

From right here, the solar races to its death and finishes as a fab dim white dwarf – the new, dense center of a dead celebrity.

Gaia is placed about 930,000 miles from Earth and consists of two telescopes to document the galaxy, along side reading stars to are expecting their future.

And although people have long believed the sun will soon swallow the Earth whole, ESA’s present day records places the ones fears to rest.

Our planet isn’t doomed as soon as the sun reaches eight billion years of age, as Gaia decided this is when it will attain a most temperature.

as a minimum two billion years later, the sun will start to quiet down and growth in length to more than double of what it’s miles nowadays. It measures about 846,000 miles extensive.

Solar energy

Solar energy is the most readily available source of energy. It is a wonderful and powerful source of energy. It does not belong to anybody and is, therefore, free. That is to say without it there will be no life.

The sun energy which reaches the surface of earth is actually the half (about 47%) of energy which falls on the top earths surface. On the other hand rest of the energy is reflected back into the space. The sun energy reaches the earth gets absorbed by land, plants and water bodies like rivers, lakes and oceans.

solar energy

Solar energy is genesis for all forms of energy.

Sun energy can be made use of in two ways:

  1. Thermal route: Using heat for drying, heating, cooking, or generation of electricity.
  2. Photovoltaic route: Which converts solar energy into electricity that can be used for various purpose For example lighting, water pumping and generation of electricity. With its pollution-free nature, virtually inexhaustible supply, and global distribution.


To measure solar radiation a special instrument is used known as Pyrometer. So pyrometer is a device that measures the temperature of distant objects. It is based on the principle that the intensity of light received by the observer depends upon the distance of the observer from source and temperature and distant source.