SpaceX registers to take rocket maker public: report

Elon Musk's SpaceX has confidentially filed for a U.S. initial public offering, setting the stage for what could become the largest stock market listing

on record, Bloomberg News reported.

A public listing at a potential valuation of more than $US1.75 trillion ($2.5 trillion) would signal that space exploration has moved from speculative venture to a mainstream investment theme. SpaceX's growth has been driven by its reusable rockets and the Starlink satellite internet network.