DAILY NO. 25 · VERIFIED MEASUREMENTS
Today's five space Size It Up comparisons with the measured size of each object, its reference and a source you can check. The puzzle is still live, so every answer stays hidden until you tap it. Haven't played yet? Play today's puzzle first.
The October 16, 2026 puzzle ran from the International Space Station at 109 m to Earth at 12,742 km — 5 orders of magnitude apart, drawing on space. The pair furthest apart was round 1: Mars is 2× as big as the Moon.
Answer: Mars — 6,779 km. Mars measures 6,779 km (length / span), which is 2× as big as the reference, the Moon at 3,474.8 km.
Mars is a little over half Earth’s diameter.
Common miss: players tend to compress Mars when it sits beside the Moon — big things get squeezed, small familiar things get stretched.
Answer: International Space Station — 109 m. The International Space Station measures 109 m (length / span), which is 1.5× as big as the reference, a Boeing 747 at 70.7 m.
The ISS spans roughly 109 metres across its solar arrays.
Common miss: players tend to compress the International Space Station when it sits beside a Boeing 747 — big things get squeezed, small familiar things get stretched.
Answer: Earth — 12,742 km. Earth measures 12,742 km (length / span), which is 1.9× as big as the reference, Mars at 6,779 km.
Earth is about 12,742 kilometres across.
Common miss: players tend to compress Earth when it sits beside Mars — big things get squeezed, small familiar things get stretched.
Answer: The Moon — 3,474.8 km. 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.
Answer: Starship Launch Stack — 121 m. 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.
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.