Tools
Put yourself in the numbers: your weight, your age, your travel time across the universe.
Your Weight on Other WorldsOne number in, seventeen worlds out.
Your Age on Other PlanetsYou’re hundreds of Mercury years old.
Space Travel TimeCar vs rocket vs light, to anywhere.
Light Travel TimeHow old is the light you see?
Distance Converterkm ↔ miles ↔ AU ↔ light-years ↔ parsecs.
Compare WorldsAny two (or four) objects, side by side.