On 06/02/2020 14:11, Andy Bennet wrote:
On 06/02/2020 14:00, Commander Kinsey wrote:
Why do barometers have different centre readings? I thought 1000 mbar
was average, as that's what barometers always used to have as the
central reading ("change"), but Wikipedia says it's 1013. I've seen
some newer ones with 1010 as the centre.

In space the average is 0 mbar

The same as the pressure between your ears.