The five space objects from the Size It Up puzzle on September 11, 2026, with the measured size of each, the reference it was compared against, a source you can check, and how the community's guesses landed. Want the surprise first? Replay this puzzle — archived days never touch your streak.
ROUND 1
Earth — 12,742 km
Answer: Earth measures 12,742 km (length / span), which is 3.7× as big as the reference, the Moon at 3,474.8 km.
Earth is about 12,742 kilometres across.
Common miss: players tend to compress Earth when it sits beside the Moon — big things get squeezed, small familiar things get stretched.
Answer: a Space Shuttle orbiter measures 37.3 m (length / span), which is 1.1× as big as the reference, an Argentinosaurus at 33 m.
The orbiter alone is about as long as a short-haul airliner — the launch stack was far taller.
Common miss: players tend to compress a Space Shuttle orbiter when it sits beside an Argentinosaurus — big things get squeezed, small familiar things get stretched.
Answer: a Starship launch stack measures 121 m (height), which is 1.1× as big as the reference, a Saturn V rocket at 110.6 m.
The complete Starship launch stack is about 121 metres tall.
Common miss: players tend to compress a Starship launch stack when it sits beside a Saturn V rocket — big things get squeezed, small familiar things get stretched.
Answer: Mars measures 6,779 km (length / span), which is 1.5× as big as the reference, the contiguous United States at 4,500 km.
Mars is a little over half Earth’s diameter.
Common miss: players tend to compress Mars when it sits beside the contiguous United States — big things get squeezed, small familiar things get stretched.
Sizes are measured along the axis named in each round and link to their published source. Explore the full library by category, or read how scoring works.