What is the largest planet in the solar system?
AnswerJupiter
Jupiter is more massive than all the other planets combined.
Science · Facts & stats
Solar facts & stats
8 fact-checked facts about the solar system, planets and moons, each with the reason behind it. 4 more are in today's round and join this page after it closes.
The basics
Which planet is known as the Red Planet?
AnswerMars
Iron oxide dust gives Mars its reddish color.
Going deeper
Which planet is the hottest?
AnswerVenus
Venus's thick carbon dioxide atmosphere traps heat, making it hotter than Mercury.
What is the largest moon in the solar system?
AnswerGanymede
Jupiter's moon Ganymede is even larger than Mercury.
About how long does sunlight take to reach Earth?
AnswerAbout 8 minutes
Light covers the 150 million km in roughly 8 minutes 20 seconds.
In what year was Pluto reclassified as a dwarf planet?
Answer2006
The International Astronomical Union reclassified Pluto in 2006.
Expert level
Olympus Mons, the tallest volcano in the solar system, is on which planet?
AnswerMars
Olympus Mons rises about 22 km above the Martian surface.
One astronomical unit is about how far?
Answer150 million km
An AU is the average Earth-Sun distance, about 150 million km.
Know these cold?Today's round is five questions like these, 20 seconds each. Your streak and level follow you to every arena.Play today's round