A Day Is — And Isn’t — 24 Hours Long
The science of how we measure the length of one Earth day
Published in
5 min readNov 9, 2020
What is a day?
We all know there are 24 hours in a day. It’s how we set our clocks and run our lives. But what exactly do we mean by “day”? It turns out there’s more than one way to define it.
