ALL ANSWERS · SPACE · DAILY No. 30 · OCTOBER 3, 2026
Size It Up Space answer: October 3
The five Space silhouettes for October 3, 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 30 ran from Mimas (396.4 km) to 55 Cancri (1,312,000 km). The widest gap was round 3, 55 Cancri against GJ 1214, at 4.4×; the closest call was round 5, Ceres against Mimas, only 2.4× 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
LHS 3844 (estimated stellar diameter) vs HD 189733 (estimated stellar diameter)
HD 189733 · reference · 1,044,000 km LHS 3844 · true diameter · 263,000 km 4.0× shorter than HD 189733
LHS 3844 has an estimated stellar diameter of about 262,974.6 km. This is the body’s size, not an orbital distance.
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ROUND 2
Proteus (Neptune’s moon · mean diameter) vs Tethys (Saturn’s moon · mean diameter)
Tethys · reference · 1,062 km Proteus · true diameter · 416 km 2.6× shorter than Tethys
Proteus, a moon of Neptune, has a mean diameter of about 416 km. This is the body’s size, not an orbital distance.
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ROUND 3
55 Cancri (estimated stellar diameter) vs GJ 1214 (estimated stellar diameter)
GJ 1214 · reference · 300,800 km 55 Cancri · true diameter · 1,312,000 km 4.4× wider than GJ 1214
55 Cancri has an estimated stellar diameter of about 1,312,090.2 km. This is the body’s size, not an orbital distance.
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ROUND 4
Pluto (mean diameter) vs Mars (mean diameter)
Mars · reference · 6,779 km Pluto · true diameter · 2,377 km 2.9× shorter than Mars
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
Ceres (mean diameter) vs Mimas (Saturn’s moon · mean diameter)
Mimas · reference · 396.4 km Ceres · true diameter · 939.4 km 2.4× wider than Mimas
Ceres has a mean diameter of about 939.4 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.