sentences: a star is made of gases & a star is very hot in temperature ->  a star is made of gases and hot in temperature  a star is made of gases and hot in temperature & the sun is a kind of star ->  the sun is made of gases and hot in temperature  the sun is made of gases and hot in temperature & the sun is the largest celestial body in the solar system -> the sun is made of gases, hot in temperature, and the largest celestial body in the solar system