ALL ANSWERS · SPACE · DAILY No. 48 · OCTOBER 21, 2026
Size It Up Space answer: October 21
The five Space silhouettes for October 21, 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 48 ran from TOI-700 e (11,720 km) to 55 Cancri (1,312,000 km). The widest gap was round 3, WASP-12 b against 55 Cancri, at 4.7×; the closest call was round 4, HD 97658 b against GJ 1214 b, 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
Jupiter (mean diameter) vs Kepler-10 c (estimated planetary diameter)
Kepler-10 c · reference · 30,040 km Jupiter · true diameter · 139,800 km 4.7× wider than Kepler-10 c
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 2
55 Cnc e (estimated planetary diameter) vs TOI-700 e (estimated planetary diameter)
TOI-700 e · reference · 11,720 km 55 Cnc e · true diameter · 23,920 km 2.0× wider than TOI-700 e
55 Cnc e has an estimated planetary diameter of about 23,917.9 km. This is the body’s size, not an orbital distance.
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ROUND 3
WASP-12 b (estimated planetary diameter) vs 55 Cancri (estimated stellar diameter)
55 Cancri · reference · 1,312,000 km WASP-12 b · true diameter · 281,000 km 4.7× shorter than 55 Cancri
WASP-12 b has an estimated planetary diameter of about 280,963.6 km. This is the body’s size, not an orbital distance.
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ROUND 4
HD 97658 b (estimated planetary diameter) vs GJ 1214 b (estimated planetary diameter)
GJ 1214 b · reference · 34,860 km HD 97658 b · true diameter · 27,040 km 1.3× shorter than GJ 1214 b
HD 97658 b has an estimated planetary diameter of about 27,043.1 km. This is the body’s size, not an orbital distance.
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ROUND 5
GJ 436 b (estimated planetary diameter) vs TOI-270 c (estimated planetary diameter)
TOI-270 c · reference · 29,720 km GJ 436 b · true diameter · 53,190 km 1.8× wider than TOI-270 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.