ALL ANSWERS · SPACE · DAILY No. 28 · OCTOBER 1, 2026
Size It Up Space answer: October 1
The five Space silhouettes for October 1, 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 28 ran from Charon (1,212 km) to HD 209458 (1,656,000 km). The widest gap was round 3, Charon against Titan, at 4.2×; the closest call was round 1, GJ 1214 against GJ 1132, 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
GJ 1214 (estimated stellar diameter) vs GJ 1132 (estimated stellar diameter)
GJ 1132 · reference · 307,600 km GJ 1214 · true diameter · 300,800 km 1.0× shorter than GJ 1132
GJ 1214 has an estimated stellar diameter of about 300,820.7 km. This is the body’s size, not an orbital distance.
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ROUND 2
HD 209458 (estimated stellar diameter) vs Sun (nominal diameter)
Sun · reference · 1,391,000 km HD 209458 · true diameter · 1,656,000 km 1.2× wider than the Sun
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 3
Charon (Pluto’s moon · mean diameter) vs Titan (Saturn’s moon · mean diameter)
Titan · reference · 5,150 km Charon · true diameter · 1,212 km 4.2× shorter than Titan
Charon, a moon of Pluto, has a mean diameter of about 1,212 km. This is the body’s size, not an orbital distance.
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ROUND 4
Pluto (mean diameter) vs Triton (Neptune’s moon · mean diameter)
Triton · reference · 2,705 km Pluto · true diameter · 2,377 km 1.1× shorter than Triton
Pluto has a mean diameter of about 2,376.6 km. This is the body’s size, not an orbital distance.
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ROUND 5
HD 189733 (estimated stellar diameter) vs Kepler-22 (estimated stellar diameter)
Kepler-22 · reference · 1,209,000 km HD 189733 · true diameter · 1,044,000 km 1.2× shorter than Kepler-22
HD 189733 has an estimated stellar diameter of about 1,043,550 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.