DAILY NO. 11 · VERIFIED MEASUREMENTS

Size It Up answers – September 11, 2026

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

Earth12,742 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.

Source ↗
ROUND 2

Space Shuttle Orbiter37.3 m

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.

Source ↗
ROUND 3

Starship Launch Stack121 m

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.

Source ↗
ROUND 4

Mars6,779 km

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.

Source ↗
ROUND 5

The Moon3,474.8 km

Answer: the Moon measures 3,474.8 km (length / span), which is about 1.2× smaller than the reference, Australia at 4,000 km.

The Moon’s mean diameter is about 3,475 kilometres.

Common miss: players tend to inflate the Moon when it sits beside Australia — big things get squeezed, small familiar things get stretched.

Source ↗

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.