Sun

The sun is the center of the universe.The sun is also by far the largest object in our solar system. It contains more than 99.8% of the of the total mass of the Solar System.

It is often said that the Sun is a "normal" star. That's true in the sense that there are many others similar to it. But there are many more smaller stars than larger ones; the Sun is in the top 10% by mass. The average size of stars in our galaxy is probably less than half the mass of the Sun.The Sun's mass is 1.989e30 kg, which is 330,000 times the mass of earth.

The core of the sun:the core is consitered to extend from the center to about 0.2 solar radii it has the density up to about 0.25 solar radii.

The sunlight is the main source of earth's energy. The solar constant is the amount of energy that deposits per square unit that is directly exposed to sunlight.

The sun is a 70 percent hydrogen and 28 percent helium and metals are less than 2 percent.this changes slowly over time as the sun converts hydrogen to helium in its core.

The sun is personified in many mythologies. The greeks called it Helios and the romans called it Sol.

The photosphere is the visable surface of the sun.

The Sun's magnetic field is very strong and very complicated. Its Magnetosphere extends well beyond Pluto. .