I have asked many people this, including my parents and science teacher, but they don’t know the answer. If a thermometer was in space, what would it read?
Thanks to those who pointed out the complicating nature of the title. A thermometer using mercury would be useless in space for the reason below – Ed
• A mercury thermometer would stop working at 234 kelvin (-39 °C) – the temperature at which mercury freezes – but there are types of thermometer that would work.
If the thermometer was in Earth’s shadow and there was no moonlight, then it would read about 3 K. This…
