ALL ANSWERS · SPACE · DAILY No. 51 · OCTOBER 24, 2026
Size It Up Space answer: October 24
The five Space silhouettes for October 24, 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 51 ran from the Moon (3,475 km) to HD 209458 b (198,700 km). The widest gap was round 3, TRAPPIST-1 g against GJ 3470 b, at 4.0×; the closest call was round 4, Kepler-10 b against LHS 3844 b, 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
TRAPPIST-1 e (estimated planetary diameter) vs Moon (Earth’s moon · mean diameter)
Moon · reference · 3,475 km TRAPPIST-1 e · true diameter · 11,740 km 3.4× wider than the Moon
TRAPPIST-1 e has an estimated planetary diameter of about 11,735.7 km. This is the body’s size, not an orbital distance.
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ROUND 2
Jupiter (mean diameter) vs HAT-P-11 b (estimated planetary diameter)
HAT-P-11 b · reference · 55,620 km Jupiter · true diameter · 139,800 km 2.5× wider than HAT-P-11 b
Jupiter has a mean diameter of about 139,822 km. This is the body’s size, not an orbital distance.
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ROUND 3
TRAPPIST-1 g (estimated planetary diameter) vs GJ 3470 b (estimated planetary diameter)
GJ 3470 b · reference · 58,300 km TRAPPIST-1 g · true diameter · 14,400 km 4.0× shorter than GJ 3470 b
TRAPPIST-1 g has an estimated planetary diameter of about 14,401.7 km. This is the body’s size, not an orbital distance.
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ROUND 4
Kepler-10 b (estimated planetary diameter) vs LHS 3844 b (estimated planetary diameter)
LHS 3844 b · reference · 16,400 km Kepler-10 b · true diameter · 18,750 km 1.1× wider than LHS 3844 b
Kepler-10 b has an estimated planetary diameter of about 18,751.6 km. This is the body’s size, not an orbital distance.
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ROUND 5
WASP-107 b (estimated planetary diameter) vs HD 209458 b (estimated planetary diameter)
HD 209458 b · reference · 198,700 km WASP-107 b · true diameter · 133,700 km 1.5× shorter than HD 209458 b
WASP-107 b has an estimated planetary diameter of about 133,690 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.