ALL ANSWERS · SPACE · DAILY No. 23 · SEPTEMBER 26, 2026
Size It Up Space answer: September 26
The five Space silhouettes for September 26, with the true sizes. If you have not played yet, this page is a spoiler — play these five first, then come back to argue with the numbers.
Day 23 ran from Epimetheus (116.4 km) to HD 209458 (1,656,000 km). The widest gap was round 5, Epimetheus against Miranda, at 4.1×; the closest call was round 3, Sun against HD 189733, only 1.3× apart — the kind of round that separates a 90 from a 60.
SPOILER · TODAY’S FIVE
You have not finished today’s puzzle on this device. The answers below are blurred so you can still play first.
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ROUND 1
HD 209458 (estimated stellar diameter) vs Kepler-22 (estimated stellar diameter)
Kepler-22 · reference · 1,209,000 km HD 209458 · true diameter · 1,656,000 km 1.4× wider than Kepler-22
HD 209458 has an estimated stellar diameter of about 1,655,766 km. This is the body’s size, not an orbital distance.
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ROUND 2
Janus (Saturn’s moon · mean diameter) vs Proteus (Neptune’s moon · mean diameter)
Proteus · reference · 416 km Janus · true diameter · 178.4 km 2.3× shorter than Proteus
Janus, a moon of Saturn, has a mean diameter of about 178.4 km. This is the body’s size, not an orbital distance.
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ROUND 3
Sun (nominal diameter) vs HD 189733 (estimated stellar diameter)
HD 189733 · reference · 1,044,000 km Sun · true diameter · 1,391,000 km 1.3× wider than HD 189733
Sun has a nominal photospheric diameter of about 1,391,400 km. This is the body’s size, not an orbital distance.
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ROUND 4
LHS 3844 (estimated stellar diameter) vs Saturn (mean diameter · globe only)
Saturn · reference · 116,500 km LHS 3844 · true diameter · 263,000 km 2.3× wider than Saturn
LHS 3844 has an estimated stellar diameter of about 262,974.6 km. This is the body’s size, not an orbital distance.
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ROUND 5
Epimetheus (Saturn’s moon · mean diameter) vs Miranda (Uranus’s moon · mean diameter)
Miranda · reference · 471.6 km Epimetheus · true diameter · 116.4 km 4.1× shorter than Miranda
Epimetheus, a moon of Saturn, has a mean diameter of about 116.4 km. This is the body’s size, not an orbital distance.
Beat these tomorrow
Every round is worth up to 100 points: within 6% of the true size scores 100, half or double scores 45, five times off scores zero. The daily puzzle is the same five for everyone and refreshes at midnight in your time zone; if you want more than five, Size It Up Unlimited draws fresh pairs from the whole library for as long as you like.