Pack
Solar System by size
Which world is bigger?
46 lotsUnlocks at level 9
Every lot is a planet, moon, dwarf planet or asteroid. Each duel is won by the larger diameter, revealed only in the arena.
Judged on
Every lot is compared on one number: Diameter.
Ratings are never shown. You bid on what you believe, then the arena reveals who was right.
How a match works
- Auction. Twelve of the 46 lots come up one by one. Both players start with twenty coins.
- Lineup. Each player secretly assigns their five lots to the five duels: Diameter.
- Arena. The five duels play out and every lot adds its power. The side with the bigger total takes the match, however the individual duels fell.
All 46 lots in Solar System by size
- SunThe star with almost all the mass in the neighbourhood
- JupiterKing of the planets, with a storm older than telescopes
- SaturnThe ringed one, light enough to float in a big enough bath
- UranusRolls around the Sun on its side
- NeptuneBlue ice giant with the fastest winds anywhere
- EarthThe only one with sea turtles
- VenusEarth's hotter, angrier twin under acid clouds
- MarsThe red planet, home to more robots than people
- GanymedeJupiter's giant moon, bigger than Mercury
- TitanSaturn's haze-wrapped moon with lakes of methane
- MercuryClosest to the Sun, scorched by day and frozen by night
- CallistoJupiter's cratered old moon, quiet for billions of years
- IoJupiter's volcanic moon, pizza-coloured and restless
- The MoonOurs, and the only other world with footprints
- EuropaAn ocean under the ice, a favourite place to look for life
- TritonNeptune's backwards-orbiting captured moon
- PlutoDemoted planet with a heart on its face
- ErisThe discovery that got Pluto demoted
- TitaniaUranus's largest moon, named from a midsummer night's dream
- HaumeaEgg-shaped dwarf planet that spins in hours
- RheaSaturn's second-largest moon, icy and pale
- OberonThe fairy king among Uranus's moons
- IapetusTwo-tone moon with a ridge around its equator
- MakemakeA reddish dwarf planet named for an Easter Island god
- GonggongDistant dwarf planet named after a Chinese water god
- CharonPluto's companion, so big the pair waltz together
- UmbrielThe darkest of Uranus's big moons
- ArielThe brightest of Uranus's moons
- DioneSaturn's moon with wispy ice cliffs
- QuaoarA Kuiper belt world with a ring it shouldn't have
- TethysSaturn's moon with a canyon across its face
- SednaSo far out that one orbit takes millennia
- CeresQueen of the asteroid belt, a dwarf planet with bright salt spots
- OrcusThe anti-Pluto, on the mirror-image orbit
- VestaThe brightest asteroid, visible to the naked eye
- PallasA big lumpy asteroid on a tilted orbit
- EnceladusSprays its ocean into space through icy geysers
- MirandaUranus's patchwork moon with the tallest cliff known
- HygieaThe roundest of the big asteroids
- ProteusNeptune's dark, lumpy inner moon
- MimasSaturn's moon that looks like a certain battle station
- NereidNeptune's moon on a wildly stretched orbit
- HyperionA sponge-shaped moon tumbling chaotically
- PhoebeSaturn's captured moon, going the wrong way
- PhobosMars's potato-shaped moon, slowly falling in
- Halley's CometThe famous visitor's peanut-shaped nucleus