Jeff Bezos will go to space next month when his company, Blue Origin, launches its first passenger-carrying mission.

The 57-year-old, who plans to travel alongside his brother, Mark, made the announcement in an Instagram post Monday. The scheduled launch next month will be about two weeks after the billionaire plans to step down as chief executive officer of Amazon.com Inc.

“Ever since I was five years old, I've dreamed of traveling to space,” Bezos said in the post. “On July 20th, I will take that journey with my brother. The greatest adventure, with my best friend.”

Blue Origin is one of several high-profile space-tourism companies backed by a wealthy entrepreneur, alongside Elon Musk's Space Exploration Technologies Corp. and Richard Branson-backed Virgin Galactic Holdings Inc. Both of those companies are making plans to carry paying customers.

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