What is Neptune's rank in terms of size among the planets in the Solar System?

• The largest

• The second largest

• The third largest

• The fourth largest

Which planet in the Solar System has the most powerful wind speeds?

• Jupiter

• Saturn

• Neptune

• Mars

How was Neptune discovered?

• Through telescopic observations

• By mathematical predictions

• By accident during a space mission

• By radio signals received on Earth

In what year was Neptune discovered?

• 1821

• 1846

• 1905

• 1930

Neptune is named after which Roman god?

• Roman god of war

• Roman god of the sea

• Roman god of the underworld

• Roman god of the sun

What type of planet is Neptune?

• Terrestrial planet

• Dwarf planet

• Icy gas planet

• Hot gas planet

Who were the astronomers that first recorded Neptune?

• Galileo Galilei & Isaac Newton

• Urbain Jean Joseph Le Verrier & Johann Galle

• Carl Sagan & Edwin Hubble

• Nicolaus Copernicus & Tycho Brahe

On what date was Neptune first recorded?

• July 4th, 1845

• September 23rd, 1846

• March 13th, 1781

• January 1st, 1801

What is the atmosphere of Neptune primarily made up of?

• Oxygen, nitrogen, and carbon dioxide

• Hydrogen, helium, and methane

• Argon, neon, and krypton

• Carbon monoxide, ammonia, and sulfur dioxide

Neptune's vivid blue color is influenced by the presence of what substance?

• Water

• Methane

• Ammonia

• Hydrogen sulfide