In 1995, he and Thomas Bopp spotted, from different states, the same mysterious object in the sky. What turned out to be a comet was named after them: Hale-Bopp.

Elon Musk’s rocket company said it would sell more than 555 million shares at $135 each in its blockbuster initial public offering, which is set to begin trading on Friday.

Elon Musk’s rocket company is spending big and losing money. That has raised questions about whether it can justify its valuation for its blockbuster initial public offering.