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Fascinating facts about unit converter (length, weight, temperature, speed…)
A light-year is about 9.46 trillion kilometres.
The kilogram was redefined in 2019 using Planck's constant.
Absolute zero (0 Kelvin) is −273.15°C — the coldest possible temperature.
Escape velocity from Earth is about 11.2 km/s (40,320 km/h).
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