Size It Up

ALL ANSWERS · SPACE · DAILY No. 11 · SEPTEMBER 14, 2026

Size It Up Space answer: September 14

The five Space silhouettes for September 14, 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 11 ran from Ceres (939.4 km) to Jupiter (139,800 km). The widest gap was round 5, Charon against Moon, at 2.9×; the closest call was round 3, Jupiter against Saturn, only 1.2× apart — the kind of round that separates a 90 from a 60.

  1. ROUND 1

    Earth (mean diameter) vs Mars (mean diameter)

    Mars · reference · 6,779 km
    Earth · true diameter · 12,740 km

    1.9× wider than Mars

    Earth has a mean diameter of about 12,742 km. This is the body’s size, not an orbital distance.

  2. ROUND 2

    Ariel (Uranus’s moon · mean diameter) vs Ceres (mean diameter)

    Ceres · reference · 939.4 km
    Ariel · true diameter · 1,158 km

    1.2× wider than Ceres

    Ariel, a moon of Uranus, has a mean diameter of about 1,157.8 km. This is the body’s size, not an orbital distance.

  3. ROUND 3

    Jupiter (mean diameter) vs Saturn (mean diameter · globe only)

    Saturn · reference · 116,500 km
    Jupiter · true diameter · 139,800 km

    1.2× wider than Saturn

    Jupiter has a mean diameter of about 139,822 km. This is the body’s size, not an orbital distance.

  4. ROUND 4

    Oberon (Uranus’s moon · mean diameter) vs Tethys (Saturn’s moon · mean diameter)

    Tethys · reference · 1,062 km
    Oberon · true diameter · 1,523 km

    1.4× wider than Tethys

    Oberon, a moon of Uranus, has a mean diameter of about 1,522.8 km. This is the body’s size, not an orbital distance.

  5. ROUND 5

    Charon (Pluto’s moon · mean diameter) vs Moon (Earth’s moon · mean diameter)

    Moon · reference · 3,475 km
    Charon · true diameter · 1,212 km

    2.9× shorter than the Moon

    Charon, a moon of Pluto, has a mean diameter of about 1,212 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.

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MixedAnimals, planets and everyday things. AnimalsLength, height or wingspan — every round names the axis. GeographyEast–west or north–south span, never area. Pop CultureCheck the version. Compare the measured dimension. VehiclesLength end to end, or height for the ones that stand upright. DinosaursCompare estimated body length, from snout to tail tip. SpaceCompare body diameter. Rings and orbital distances are excluded. Everyday ObjectsLength, height or width — every round names the axis. InsectsBody length or wingspan — read the named measurement. LandmarksRead the named height, length or main span — including its endpoints. Food & DrinkRead the selected size and axis — length, diameter or container height.
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