New Delhi, June 12 -- Elon Musk told JPMorgan Chase chief executive Jamie Dimon on Thursday that Earth can support only a fraction of the artificial intelligence computing power that could be built on the Moon, proposing to fire AI data centres into deep space using an electromagnetic railgun as SpaceX prepares to list on Friday in what is anticipated to be the world's largest IPO, targeting a valuation of $1.75 trillion.

Musk's central argument to a room of 350 investors at JPMorgan's Manhattan headquarters was stark in its scale. Terrestrial constraints on energy and infrastructure place a hard ceiling on how much AI computing power can realistically be built on Earth, he said, and the Moon removes those constraints entirely.

"I think...