A cloud of gas, if large enough, begins to contract. The density and temperature increase, so that nuclear fusion can begin. This is when Hydrogen becomes Helium.When hydrogen is "burned", the contraction stops. At this time, the gas becomes a star
A star begins its life as a cloud of dust and gas (mainly hydrogen) known as a nebula. Explanation: A prostate is formed when gravity causes the dust and gas of a nebula to clump together in a process called accretion. ... If a critical temperature in the core of a prostate is reached, then nuclear fusion begins and a star is born
