The Sun is the primary source of energy for Earth's climate system
It has the mass of about , Earths and is about times the diameter of the Earth.
The Sun's core has a very high temperature, more than million degrees Kelvin
The element helium got its name from the Sun.
The mass of the Sun is 500 times greater than the sum of the masses of all the planets around it.
The photosphere is the layer of the Sun's surface that emits visible light.
The Sun's activity changes periodically.