| Earth, Moon and Sun | Exploring Space | The Solar System | Galaxies and Universe | 
|---|---|---|---|
| 
					  What is Earth's rotation on its axis					 
					 24 hours | 
					  What is the space shuttle					 
					 can be used many times to carry astronauts into space | 
					  What is largest gas giant					 
					 Jupiter | 
					  What is surface temperature					 
					 what determines whether a protostar becomes a star | 
| 
					  What is one complete revolution of Earth around the Sun					 
					 one year | 
					  Who is the first human in space					 
					 Yuri Gararin | 
					  What is heliocentric system					 
					 sun is the center of the system of planets | 
					  What is astronomers prediction of the existence and orbit of Neptune					 
					 Neptunes gravitational effect on the orbit of Uranus | 
| 
					  What is the amount of the lighted side of the moon you see is the same					 
					 first and third quarter phase | 
					  Who in 1900s, developed experimental rockets					 
					 Robert Gargarin | 
					  What is  photosphere					 
					 layer of sun you look at | 
					  What is parallax					 
					 used to determine a star's distance from Earth | 
| 
					  What is the reason you are less likely to see a solar eclipse than a lunar eclipse					 
					 the moon's umbra only covers a small area on Earth's surface | 
					  What is a shuttle's payload bay					 
					 carry satellites into orbit | 
					  What is the chromosphere and corona					 
					 layers of sun you see during solar eclipse | 
					  What is a star is born					 
					 nuclear fusion starts | 
| 
					  What is a neap tide					 
					 When the sun's pull is at right angles to the moon's | 
					  What is extreme temperatures in space					 
					 space is a vacuum | 
					  What do outer planets have in common					 
					 larger than earth and made mainly on hydrogen and helium | 
					  What is thrust					 
					 first stage of a multistage rocket |