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How The Sun Was formed? In space there are huge clouds of gases and dust. New stars are made when parts of the gases and dust join together and form a tight mass. The mass make heat. As the mass of gases and dust gets smaller the center of the mass gets hotter. Then the center becomes so hot that the mass of gases and dust begins to shine as a star. Scientists believe the sun was made from a mass of gases and dust. They think the planets were formed from gases and dust that form at different distances from the center of the sun. How Was the Solar System Formed People believe that our solar system was formed from a giant rotating cloud of gas and small parts of rock and metals. This cloud is called a nebula according to this theory, the solar nebula started to shrink. As it got smaller it spun faster then flatten. into a disk. Scientists believe that particles within the flattened disk. Some scientists think that particles in the flattened disk then smashed into each other and sucked together and made a asteroid-sized object. Some of these object formed plants. Others made moons , asteroid , and comets. Most of the material in the nebula was pulled into the center and formed the sun. According to the theory the pressure in the center became great enough to make the nuclear reactions that powered the sun. Eventually the solar eruptions occurred casing a solar wind. In the center of the solar system the wind was so strong that it blow away most of the lighter objects. In the outer regions of the solar system but the solar wind was much weaker . As a result much more gas remained on the outer planets. That’s why the inner planets are small rocky worlds and the outer planets are giant balls of gas.