The Planets and the Sun Crossword Puzzle

QUESTIONS LIST: jupiter : _ has a storm system known as the great red spot, rocky planets : the inner planets are often called the _ _ (two words), million : the sun is closer than other stars, but it is still 93 _ miles away from earth, mars : _ is often called the red planet because of its color, neptune : _ is the windiest planet in the solar system, mercury : _ looks like our moon because of meteorites from long ago, earth : this planet has an atmosphere that is mainly a mixture of nitrogen and oxygen, hydrogen : the sun is a massive ball of gas made of _ and helium, water : earth is the only planet in the solar system with liquid _ , venus : earth lies between _ and mars, greenhouse : venus' thick atmosphere traps heat because of the _ effect, billion : scientists think that our solar system is more than 4.6 _ years old, saturn : this planet is known for its rings that are made of ice and dust, uranus : methane gas gives this planet a blue-green color.