Those luminous heavenly bodies which have their own light are called stars. We can see near about 2500 stars on a clear night with our naked eye. But in actual, total no of stars are countless. The star which is nearest to earth is sun. ...

Sun spots are the dark spots which are present on the visible disk when the snaps of sun are taken in the presence of white light. These black spots have low temperature than that of their surrounding surface. This is the reason that they appears ...

Let’s take into account a planet revolving around the sun having mass m and T is its period of revolution. Suppose mass of sun to be M and R its radius. The equation for the centripetal force is given below: ...

Let’s suppose that the temperature on the surface of sun is T and radius R. Also suppose that the sun is a black body and is present at the centre of a hollow sphere having radius r. r will be greater than R because sun is ...

Amount of energy scattered by sun per second in all directions is called as solar luminosity of the sun. Its symbol is Ls. Let’s suppose that there is a hollow ...

The brightest star near to earth is called sun. The emission of electromagnetic radiations in radio as well as visible regions is done by sun. Its other name is ‘Yellow Dwarf Star’. Some of the main properties of sun are discussed below: 1. Solar Interior: Hydrogen is ...

There are three basic conditions for the existence of life on a planet 1. Water on the planet should be in abundance. 2. The planet’s atmosphere must be free from harmful gases. 3. The temperature on the planet must be tolerable to the living beings. It is found from the observations ...

The composition of a planet can be checked from the radiations of the spectrum. Large number of dark lines can be found in a spectrum. From these dark lines we can find the various elements existing on that surface. ...