Three of the founders of America’s top private space companies have stated their personal desire to fly into space. But only one will be first. Jeff Bezos is head of the rocket company Blue Origin. He also founded the online store Amazon. Bezos has announced plans to make his wish come true next month on the company’s first human space flight. If successful, the 57-year-old would become the first person to ride his own company’s rocket into space. Two other founders -- Elon Musk of SpaceX and Richard Branson of Virgin Galactic -- have said they also want to ride into space on a company-built spaceship. Ever since I was five years old, I've dreamed of traveling to space,” Bezos said in a message announcing his plans on Instagram. He said he would be making the trip with his brother, Mark. “On July 20th, I will take that journey with my brother. The greatest adventure, with my best friend,” Bezos said. Joining the brothers will be at least one other passenger who is being chosen by an online auction. Blue Origin’s New Shepard rocket and capsule can carry up to six people. The spacecraft will take its passengers on a 10-minute flight to about 105 kilometers above Earth. That distance is a common international definition for the beginning of space, also known as the “Karman line.” The passengers are expected to spend about four minutes in this suborbital space, where they can experience weightlessness and observe the curvature of Earth. The rocket will take off from Blue Origin’s launch center in a rural area of West Texas. After the capsule separates, the reusable rocket is designed to return to Earth and land in an upright position by itself. The capsule is designed to float back to the surface with three large parachutes. Blue Origin said it has carried out 15 successful test flights of New Shepard, but none of those carried humans. The spacecraft is named after NASA astronaut Alan Shepard, the first American to go into space. The planned launch date is July 20. The date was chosen because it is the 52nd anniversary of the first moon landing by Apollo 11 astronauts Neil Armstrong and Buzz Aldrin. Bezos has said he will step down as Amazon’s chief 15 days before the launch. Earlier, he announced that he wanted to spend more time on projects for Blue Origin. On its website, the company says its goal is to develop reusable launch vehicles for civilian and defense purposes. The Bezos flight will officially launch the company's space tourism business. The company has yet to start selling seats to the public or announce prices for the short trips.