Neptune and Uranus

Under ordinary conditions, how many planets can you see in the sky without a telescope?

• four
• five
• six
• seven

In 1781, who discovered the planet Uranus using a telescope?

• Edmund Hubble
• William Herschel
• Isaac Newton
• Nicolaus Copernicus

Named after the reigning king, what was the original name for Uranus?

• Henrium Sidus
• Richardium Sidus
• Georgium Sidus
• Edwardium Sidus

Originally named after a king, Uranus is now named after _____

• a Roman god
• a Greek god
• a Norse god
• an Egyptian god

Uranus is massive; it's about _____ times the mass of Earth

• 4.5
• 8.5
• 14.5
• 20.5

To distinguish it from the gas giants Jupiter and Saturn, Uranus is called _____

• an ice giant
• a frosty dwarf
• a gas dwarf
• a snow giant

The pressure inside Uranus can break up methane molecules, possibly creating an ocean of _____

• diamonds
• sapphires
• graphite
• coal

Which molecule is really good at absorbing red light, making Uranus look distinctly cyan?

• hydrogen
• helium
• ammonia
• methane

Which gas, in the atmosphere of Uranus, smells like rotten eggs?

• ammonia
• hydrogen sulfide
• methane
• carbon monoxide

The atmosphere of Uranus has a temperature of _____

• -220 °C
• -120 °C
• -170 °C
• -270 °C