What is Sun?
admin 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…
What is solar luminosity?
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…
What will be expression for the surface temperature of the sun?
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…
What will be the mass and density of the sun?
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…
What are sun spots and also explain solar activity?
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…
Explain Stellar evolution in detail?
According to the rule of nature that nothing is permanent. So, stars after completing their life period become dead ultimately. Stellar evolution basically describes the life cycle of a star.…
Explain the different categories of Galaxies?
Galaxy is a name given to the collection of stars. There are a no of galaxies present in the universe. Galaxies may or may not have regular shapes. The sizes…
What are Quasars?
The word Quasar is made up of Quasi-Stellar-Radio-Sources. Basically quasar is a category of radio galaxies. Quasars are the heavenly bodies similar to stars. These are strong source of radio…
What are PULSARS?
Those sources which have the power to emit the radio signals after fixed time intervals. The discovery of the PULSAR was not done by a single person. It was a…
What are Star Clusters?
In galaxies there are small groups of stars. These small groups of stars present inside a galaxy are known as star clusters. Two types of clusters are there:- 1. Globular…