What kind of planet is Neptune? Choices: Terrestrial, Gas giant, Dwarf planet, Ice giant
How was Neptune discovered, unlike any other planet? Choices: It was found by accident during a survey, It was predicted by math before it was seen, It was found using a space telescope, It was found by a fly-by spacecraft
Who discovered Neptune in 1846? Choices: William Herschel, Edwin Hubble, Johann Galle, Galileo Galilei
Where does Neptune rank in distance from the Sun? Choices: Sixth, Seventh, Fifth, Eighth
What nickname do Uranus and Neptune share, because of their icy makeup? Choices: Gas giants, Ice giants, Rocky worlds, Dwarf planets
About how long is a year on Neptune? Choices: About 84 Earth years, About 120 Earth years, About 165 Earth years, About 200 Earth years
What gas gives Neptune its deep blue color? Choices: Ammonia, Carbon dioxide, Oxygen, Methane
Which moon of Neptune orbits backward compared with the planet's spin? Choices: Triton, Proteus, Nereid, Larissa
About how long is one day on Neptune? Choices: About 10 hours, About 16 hours, About 24 hours, About 30 hours
What is the name of Neptune's largest moon? Choices: Proteus, Nereid, Triton, Larissa
Which spacecraft is the only one to have visited Neptune? Choices: Voyager 1, Voyager 2, Cassini, New Horizons
What is the fastest wind speed recorded on Neptune? Choices: About 400 km/h, About 900 km/h, About 1,500 km/h, About 2,100 km/h
Which planet is most similar to Neptune in size and makeup? Choices: Saturn, Jupiter, Uranus, Mars
About how long does sunlight take to reach Neptune? Choices: About 8 minutes, About 2.7 hours, About 4 hours, About 10 hours
In which year did Neptune complete its first full orbit since its discovery? Choices: 1946, 1981, 2011, 2046