- How small the Planck length is: atom and proton comparisons and a common myth1.616×10⁻³⁵ m · about 10²⁵ times smaller than an atom · not a pixel of space
- Why the observable universe is 46.5 billion light-years in radius when the universe is 13.8 billion years oldSpace stretched while the light travelled · ~93 billion ly across · not the whole universe
- The middle size of the universe on a log scale, with a powers-of-ten size ladder62 orders of magnitude · geometric mean ~0.12 mm · humans sit on the large side
- A backyard solar system scale model: sizes and distances on one scale1 : 4.6 billion · Earth 2.7 mm · Neptune ~1 km · nearest star 8,600 km
- How far a light-year is, and cosmic distances as light travel time9.46 trillion km · Moon 1.3 s · Sun 8 min 19 s · Voyager 1 at one light-day
- Stars in the universe vs grains of sand on Earth, with a Fermi estimateSand ~7.5×10¹⁸ · stars ~7×10²² or more · breaking an estimate into steps
- Idle clicker prestige timing: multiplier math and a checklistNew multiplier ÷ current multiplier · slowdown signs · spend or save
- Idle game upgrade efficiency and payback time, worked outGain ÷ cost · payback time · level milestone x2
- How idle game offline earnings work, and how to manage the capSettled when you return · 8-hour default cap · cap alert
- Common space and science myths, with current answersGreat Wall · Andromeda 50/50 · bacteria 1.3 to 1 · 46.5 billion ly
Infinite Universe: Idle Space Clicker
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