The sun is heart of solar system and eight planet orbit the sun, asteroid belt, dwarf planet and trans neptunian region are also part of our solar system. SUN:- Age of sun is about 45,000 to 47,000 million years.Period of rotation is 25 days, 9 hours,7 min at equater. mass of sun is 1,989x10 27 tonnes.and diameter of sun is 1,391,000km.Tempurature of sun is 16,000,000 degree celcious in core 5,500 degree celcious at surface. Density of sun is 1.41 times that of water. MERCURY VENUS ...