Space age

typescript/space-age/space-age.ts

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+const earthYears = {
+  mercury: 0.2408467,
+  venus: 0.61519726,
+  earth: 1.0,
+  mars: 1.8808158,
+  jupiter: 11.862615,
+  saturn: 29.447498,
+  uranus: 84.016846,
+  neptune: 164.79132,
+} as const;
+
+type Planet = keyof typeof earthYears;
+
+const roundTwoDecimals = (num: number): number => Math.round(num * 100) / 100;
+
+export function age(planet: Planet, seconds: number): number {
+  const minutes = seconds / 60;
+  const hours = minutes / 60;
+  const days = hours / 24;
+  const years = days / 365.25;
+  return roundTwoDecimals(years / earthYears[planet]);
+}