NEW YORK — You’ve heard about the International Space Station for years. Want to visit?

NASA announced Friday that the orbiting outpost is now open for business to private citizens, with the first visit expected to be as early as next year.

There is a catch, though: You’ll need to raise your own cash, and it won’t be cheap.

Travelers will pay an estimated $58 million for a round-trip ticket. And accommodations will run about $35,000 per night, for trips of up to 30 days long.

“But it won’t come with any Hilton or Marriott points,” said NASA’s chief financial officer Jeff Dewit during a news conference at Nasdaq in New York City.

Travelers don’t have to be U.S. citizens. People from other countries will also be eligible, as long as they fly to the space station on a U.S.-operated rocket.

Depending on the market, the agency will allow up to two visitors per year, for now. And the private astronauts will have to meet the same medical standards, training and certification procedures as regular crew members.

The space station has welcomed tourists before by way of Russian rockets. In 2001, California businessman Dennis Tito became the first visitor by paying for a journey and several others have followed.

Friday’s announcement marks the first time NASA is allowing private astronauts on board. The program is part of NASA’s efforts to open the station to private industries, which the agency hopes will inherit the orbiting platform someday.

Eventually, the space station will become too expensive for the government to maintain, said Bill Gerstenmaier, a NASA’s associate administrator. So the idea is to let the private sector start using the station now and perhaps eventually take it over, he said.

The NASA officials said some revenue from commercial activities will help the agency focus its resources on returning to the moon in 2024, a major goal of the Trump administration. The agency said this will also reduce the cost to U.S. taxpayers for this next lunar mission.

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