Question 1 of 15
Which planet has the fastest winds in the solar system?
Why: Neptune's winds reach roughly 1,200 mph, faster than anywhere else measured in the solar system.
Question 2 of 15
What is Jupiter's Great Red Spot?
Why: It is an anticyclonic storm wider than Earth that has been observed for well over a century.
Question 3 of 15
Which planet is the hottest in the solar system?
Why: Venus averages about 465 degrees Celsius because a dense carbon dioxide atmosphere traps enormous heat.
Question 4 of 15
What is Venus's surface atmospheric pressure compared to Earth's?
Why: Standing on Venus would feel like being about 900 metres deep in Earth's ocean.
Question 5 of 15
What falls as rain on Saturn's moon Titan?
Why: Titan has a full methane cycle with clouds, rain, rivers, and polar lakes of liquid hydrocarbons.
Question 6 of 15
What kind of storms can engulf the entire planet Mars?
Why: Planet-encircling dust storms can last for weeks and once ended a NASA rover mission by blocking sunlight.
Question 7 of 15
What is unusual about the storm at Saturn's north pole?
Why: A six-sided jet stream pattern thousands of miles across has persisted at Saturn's north pole for decades.
Question 8 of 15
What are the clouds of Venus mostly made of?
Why: Sulfuric acid droplets form the reflective cloud deck, and the rain evaporates long before reaching the surface.
Question 9 of 15
What is theorised to fall deep inside Neptune and Uranus?
Why: Extreme pressure is thought to split methane and compress the carbon into diamond that sinks inward.
Question 10 of 15
How thick is the Martian atmosphere relative to Earth's?
Why: Mars has roughly 0.6 percent of Earth's surface pressure, mostly carbon dioxide.
Question 11 of 15
What is Venus's atmospheric super-rotation?
Why: Venus takes 243 Earth days to rotate, yet its upper atmosphere laps the planet in about four days.
Question 12 of 15
Which planet has essentially no atmosphere and therefore no weather?
Why: Mercury retains only a wisp of an exosphere, far too thin to produce weather.
Question 13 of 15
What are Jupiter's colourful bands?
Why: Light zones are rising gas, dark belts are sinking gas, and powerful jets separate them.
Question 14 of 15
Where in the solar system does it snow carbon dioxide?
Why: Mars gets cold enough at the poles for carbon dioxide to freeze directly out of the atmosphere as dry ice.
Question 15 of 15
Why does Uranus have such extreme seasons?
Why: Uranus essentially rolls on its side, so each pole gets about 42 years of continuous sunlight then darkness.