It is a group of stars and star clusters spinning and moving together in space.​ ​ (a)  

it is a galaxy with smooth round or oval outline. The shape is probably due to its slow spin.​ ​ ​ (a)  

it suggests that God created the whole universe in seven days which is stated and supported in the bible.​ ​ ​ ​ (a)   ​

it states that the universe started as a single explosion followed by a burst of inflationary expansion.​ ​ (a)   ​

This theory proposes that the universe passes through a regular cycle of expansion and contraction.​ (a)   ​

This theory was postulated that the universe was created by an ancient explosive force.​ (a)  

This theory states that the universe had no origin. it has always existed and will have no end.​ ​ (a)  

He believed that the earth was the center of the universe and everything in the sky revolve around it in circular orbit.​ ​ ​ (a)  

He discovered the phases of Venus.​ (a)