Is being built in Chile.
When it is finished, Bishop Michael Bird plans to rent it for the weekend, to scour the universe for a same-sex couple to marry.
The observatory will be constructed on Cerro Armazones, a 3,000m-high mountain in Chile’s Atacama Desert.
The E-ELT (European Extremely Large Telescope) will have a primary mirror 42m in diameter – about five times the width of today’s best telescopes.
Astronomers say the next-generation observatory will be so powerful it will be able to image directly rocky planets beyond our Solar System.
It should also be able to provide major insights into the nature of black holes, galaxy formation, the mysterious “dark matter” that pervades the Universe, and the even more mysterious “dark energy” which appears to be pushing the cosmos apart at an accelerating rate.