The 3D installation will rotate once every four minutes - 360 faster than our real planet.
Renowned artist Luke Jerram created it and called it Gaia, which in Greek means the personification of the earth.
The artwork will be one of the key pieces in the Changing Tides creative programme and will feature NASA imagery of the earth's surface.
Visitors during certain times of the day will have the opportunity free of charge to experience Gaia with a specially made surround sound composition by BAFTA award-winning composer Dan Jones.
The piece will be floating above the heads of visitors to the cathedral until 23rd June.
The Earth has arrived in Liverpool, and it's as beautiful as we imagined.#Gaia by artist @lukejerram opens Sat 25 May and you can see it for free @LivCathedral until 23 June. ✨— The Guide Liverpool (@TheGuideLpool) May 24, 2019
Part of @riverfestlpool with @CultureLPool@lpoolcouncil
More info https://t.co/4yJpoKpchspic.twitter.com/RRpvUqHYr2
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