ALL ANSWERS · SPACE · DAILY No. 19 · SEPTEMBER 22, 2026
Size It Up Space answer: September 22
The five Space silhouettes for September 22, 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 19 ran from Pan (28 km) to Kepler-10 (1,482,000 km). The widest gap was round 2, Epimetheus against Pan, at 4.2×; the closest call was round 4, LHS 1140 against GJ 1214, only 1.0× 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
Kepler-10 (estimated stellar diameter) vs Sun (nominal diameter)
Sun · reference · 1,391,000 km Kepler-10 · true diameter · 1,482,000 km 1.1× wider than the Sun
Kepler-10 has an estimated stellar diameter of about 1,481,841 km. This is the body’s size, not an orbital distance.
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ROUND 2
Epimetheus (Saturn’s moon · mean diameter) vs Pan (Saturn’s moon · mean diameter)
Pan · reference · 28 km Epimetheus · true diameter · 116.4 km 4.2× wider than Pan
Epimetheus, a moon of Saturn, has a mean diameter of about 116.4 km. This is the body’s size, not an orbital distance.
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ROUND 3
GJ 1132 (estimated stellar diameter) vs TRAPPIST-1 (estimated stellar diameter)
TRAPPIST-1 · reference · 165,900 km GJ 1132 · true diameter · 307,600 km 1.9× wider than TRAPPIST-1
GJ 1132 has an estimated stellar diameter of about 307,638.5 km. This is the body’s size, not an orbital distance.
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ROUND 4
LHS 1140 (estimated stellar diameter) vs GJ 1214 (estimated stellar diameter)
GJ 1214 · reference · 300,800 km LHS 1140 · true diameter · 300,400 km 1.0× shorter than GJ 1214
LHS 1140 has an estimated stellar diameter of about 300,403.3 km. This is the body’s size, not an orbital distance.
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ROUND 5
Proxima Centauri (estimated stellar diameter) vs Kepler-186 (estimated stellar diameter)
Kepler-186 · reference · 727,700 km Proxima Centauri · true diameter · 196,200 km 3.7× shorter than Kepler-186
Proxima Centauri has an estimated stellar diameter of about 196,187.4 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.