Space tourism is the practice of traveling into space for recreational, leisure, or adventure purposes. It is a subset of the commercial space industry and aims to provide non-professionals (such as astronauts or scientists) with the opportunity to experience space travel. As the technology continues to develop and the cost decreases, space tourism is becoming more accessible to private individuals.

There are several types of space tourism:

1. Suborbital Space Tourism

2. In suborbital flights, tourists travel to the edge of space (above the Kármán line, which is about 100 kilometers or 62 miles above the Earth) but do not orbit the planet. These flights typically last a few minutes and allow passengers to experience weightlessness and see the curvature of the Earth. Companies like Blue Origin and Virgin Galactic offer these types of flights.

2. Orbital Space Tourism: In orbital flights, tourists travel into orbit around the Earth. These trips can last several days or even weeks and usually involve staying on a space station, such as the International Space Station (ISS). These trips are currently more expensive and less frequent than suborbital flights due to the higher complexity and risk.

3. Lunar Tourism: This is a type of space tourism that involves traveling to the Moon. Although still in the early stages, several companies have announced plans to offer commercial lunar flights in the future.

4. Deep Space Tourism: This is a more ambitious form of space tourism that would involve traveling beyond the Moon to other celestial bodies, such as Mars or asteroids. This type of space tourism is still largely in the conceptual and planning phases, but some companies and organizations are exploring the possibility.

As space tourism technology and infrastructure continue to improve, the industry is likely to expand and offer a variety of experiences  for different budgets and interests.