Planet Neptune Crossword Puzzle

QUESTIONS LIST:

• hydrogen : 2nd part of the atmosphere.
• neptune : farthest planet away from the sun.
• 28 billion miles : distance from the sun.
• triton : it's biggest moon. also named after the little mermaid's father.
• john couch adams : the man who discovered neptune.
• voyager 2 : the only spacecraft to have flown by neptune.
• methane : 3rd part of the atmosphere.
• helium : 1st part of it's atmosphere.
• rings : like saturn and uranus, has 4 in total.
• gas giant : composed mainly of hydrogen and helium.