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The delivery of my scale rulers to New Zealand was excellent. I can highly recommend doing business with Building Link Ltd, these people know the value of a customer; I will be coming back.

John Oliver HIANDRI Solutions Ltd, New Zealand

Galactic Astronomy - Redshift scale rulers

Galactic Astronomy - Redshift scale rulers

Redshift describes how light from objects in space (such as stars or galaxies) changes as they move away from an observer.  As they travel further away, the wavelength of their light increases ‘shifting’ it towards the red end of the spectrum.

The further away a galaxy is, the more the light from it is red-shifted.  Scientists have used this to suggest that the whole universe is expanding and everything is moving away from everything else.

We were asked by the Royal Astronomical Society to produce a ‘redshift’ scale ruler.  They supplied us with the required scales and we were able to customise our 300mm oval flat scale ruler to accommodate the design.

“The concept came from an academic paper. So in galactic astronomy we measure lots of things in redshift, which is both a distance away, and also how long ago - as the two are linked. So one side of the ruler allows conversion from redshift to time (both since the big bang - Age in Gigayears, and how long ago - lookback).

The other side is more about how big things are on the sky. A size on the sky gets bigger the further away it is -- up to a point then gets smaller because the universe was smaller way back when”  Royal Astronomical Society

Our digital printing process allows us to fully customise our scale rulers - both 150mm and 300mm lengths.  For further details please contact us on 01206 272020 or e-mail us at