ALL ANSWERS · SPACE · DAILY No. 57 · OCTOBER 30, 2026
Size It Up Space answer: October 30
The five Space silhouettes for October 30, 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 57 ran from Tethys (1,062 km) to K2-18 (571,900 km). The widest gap was round 3, WASP-107 b against K2-18, at 4.3×; the closest call was round 1, Tethys against Dione, only 1.1× 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
Tethys (Saturn’s moon · mean diameter) vs Dione (Saturn’s moon · mean diameter)
Dione · reference · 1,123 km Tethys · true diameter · 1,062 km 1.1× shorter than Dione
Tethys, a moon of Saturn, has a mean diameter of about 1,062.2 km. This is the body’s size, not an orbital distance.
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ROUND 2
TRAPPIST-1 b (estimated planetary diameter) vs LHS 3844 b (estimated planetary diameter)
LHS 3844 b · reference · 16,400 km TRAPPIST-1 b · true diameter · 14,240 km 1.2× shorter than LHS 3844 b
TRAPPIST-1 b has an estimated planetary diameter of about 14,235.9 km. This is the body’s size, not an orbital distance.
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ROUND 3
WASP-107 b (estimated planetary diameter) vs K2-18 (estimated stellar diameter)
K2-18 · reference · 571,900 km WASP-107 b · true diameter · 133,700 km 4.3× shorter than K2-18
WASP-107 b has an estimated planetary diameter of about 133,690 km. This is the body’s size, not an orbital distance.
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ROUND 4
Triton (Neptune’s moon · mean diameter) vs Iapetus (Saturn’s moon · mean diameter)
Iapetus · reference · 1,469 km Triton · true diameter · 2,705 km 1.8× wider than Iapetus
Triton, a moon of Neptune, has a mean diameter of about 2,705.2 km. This is the body’s size, not an orbital distance.
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ROUND 5
GJ 436 b (estimated planetary diameter) vs TRAPPIST-1 c (estimated planetary diameter)
TRAPPIST-1 c · reference · 13,990 km GJ 436 b · true diameter · 53,190 km 3.8× wider than TRAPPIST-1 c
GJ 436 b has an estimated planetary diameter of about 53,193.4 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.