2.  In between the stars in a galaxy, there are clouds of hydrogen gas and dust called nebula

3.  Our Sun and solar system were probably formed from one of these Nebula.  The two most accepted theories of how this occurred are:  Stellar Collision Theory  Nebular Hypothesis

4.  Our Sun and the planets were spun off from collisions between stars

5.  believed to be more likely, from our observations of other star systems  that the Sun and planets formed when a large nebula condensed and collected together by gravity

6.  Distances to most stars from Earth are in the millions of A.U.s  Light Year It is the distance that light, which moves at 300 000 km/s, travels in a year. It is equal to about 9.5 trillion km.

7.  Moon takes about 1.3 s  The Sun takes 8 min  Jupiter takes 41 min  Alpha Centauri light takes 4.3 years  Polaris 430 years  Andromeda galaxy of 2.5 million light-years

8.  227,939,100 km ÷ 300,000 km/sec  = 75.997 sec = 1.27 min

9. ▪ (i)nebula ▪ (ii)spiral and elliptical galaxies ▪ (iii)giant stars ▪ (iv)dwarf stars ▪ (v)quasars ▪ (vi)black holes