Before informing you about space tourism options and startup companies, I would like to explain the difference between suborbital and orbital flights.
In order to understand the difference you should know that an orbit describes the path followed in space by a body around another body as a result of gravity. For instance, the Earth orbits the sun just like these days many satellites orbit around the Earth.
The main differences between suborbital and orbital flights are velocity and height. The velocity required for orbital flights is called orbital velocity. It depends on the altitude of the orbit. To give you an example, orbital flights at an altitude of 200 km require an orbital velocity of 7 780 m/s (~28 000 km/h). Orbital flights are placed on a trajectory where they could remain in space for at least one orbit. They fly along the curvature of Earth and never fall back to Earth on their own. (One orbit around the Earth takes 90 minutes.)
Suborbital flights require a flight speed which is about 8 times smaller than the orbital velocity (~950 m/s) and peak at an altitude of 100 to 160 km. Any flight outside Earth's atmosphere with a maximum flight speed below the orbital velocity is called a suborbital flight. The spacecraft only leaves the Earth's atmposphere for a few minutes during which the engines are shut off. Within these minutes passengers experience weightlessness. Then the spacecraft falls back to Earth and re-enters the atmosphere. The duration of microgravity depends on the altitude which is reached during the flight. To give you an example, 3:10 minutes of weightlessness can be experienced at an altitude of 100 km.
Due to this tremendous difference in required flight speed the vehicle design for suborbital and orbital flights varies greatly. Thus, suborbital vehicles are smaller in size and mass, technically simper and therefore cheaper in design and operation.
The leading companies at the moment are Virgin Galactic, Space Adventurers and Blue Origin.
Virgin Galactic is an American commercial spaceflight company. The British entrepreneur Richard Branson plans to provide suborbital spaceflights to tourists via Virgin Group. Virgin Group consists of more than 400 companies worldwide with its core business areas travel, entertainment and lifestyle. Virgin Galactic is currently running a test flight program with Space Ship Two, the successor of Space Ship One from 2004 (designed by Burt Rutan). Contrary to Space Ship One, whose only purpose was to fly to space twice and return undamaged, Space Ship Two is intended to actually take tourists into space one day. As the test results are very promising, commercial flights are expected to begin around 2015 and more than 530 people have already signed up. The flights will be launched from New Mexico’s Spaceport America. The space jet will carry six passengers for $200,000 each. It will reach an altitude of 110 km and take about two and a half hours. Space Ship Two will allow its passengers to feel weightless for about five minutes.
Since 2004 Space Adventurers, a space tourism company from Virginia, offers the experience of various states of microgravity (for instance, gravitational state on Mars or the moon) starting at $4,950 per passenger up to §165,000. The states of microgravity are achieved by doing aerobatic maneuvers known as parabolas with a specially modified Boeing 727, called G-Force One. It all happens between an altitude of 24 000 and 34 000 feet. At the altitude of 24 000 feet the aircraft is gradually being pulled up by the pilot to reach an angle of about 45° to the horizon until reaching the altitude of 34 000 feet. During this pull-up 1.8 Gs are felt by the passengers. Then the spacecraft flies back to the altitude of 24 000 feet at an angle of 30° to the horizon which takes about 20 to 30 seconds during which passengers experience weightlessness. This maneuver is repeated 12-15 times. To experience Lunar (one sixth your weight) or Martian (one third your weight) gravity a different arc over the top of the parabola is flewn.
(http://www.spaceadventures.com/index.cfm)
(http://www.spaceadventures.com/index.cfm)
Blue Origin, which is founded by Amazon.com CEO Jeff Bezos, is currently developing a fully reusable suborbital vehicle called New Shepard, which will fly a minimum of three passengers to space.The development of reusable vehicles is intended to significantly decrease the costs associated with flying to space.
(http://www.blueorigin.com/)
(http://www.blueorigin.com/)
Besides the three leading companies at the moment there has been a significant increase in startup companies over the last few years which increasingly gain importance. Logically, different companies have different ideas about how to transport people to space and they have different intentions.
World View, for instance, a Tucson-based company (Arizona), wants to take tourists to near-space by 2016 - not with a rocket, but with a high-altitude balloon. Customers paying $75,000 could spend two hours floating 30 kilometers above the ground. The passengers would not experience weightlessness. Yet, they would still have a magnificent view of the blackness of space against the curvature of Earth - a sight usually only afforded to astronauts. The first launch site is probably going to be Page, Arizona. The weather there is perfect for launching balloons and it happens to be fairly close to Las Vegas which will probably result in many tourists passing by.
SpaceX, a private spaceflight company owned by Elon Musk, wants to launch missions for the United States Air Force using its new Falcon rocket as soon as in 2015. They are creating private space taxis and cargo ships to launch astronauts and supplies into space.
EADS (the European Aeronautic Defence and Space Company), now called Airbus is at present preparing its commercial space plane prototype for a drop test. The business-jet sized space plane that is intended to bring tourists into space sooner or later will go up 100 km allowing the passengers to experience zero gravity.
All in all, many companies are planning to offer suborbital flights very soon, but so far no suborbital space tourism has occurred yet. However, tourists already have the possibility to go on an orbital holiday. Currently the only vehicle taking tourists to orbital space is the Russian Soyuz which belongs to the Russian Federal Space Agency, commonly known as Roscosmos. In cooperation with Space Adventurers, Roscosmos has sent seven tourists to space so far and they have all travelled to the International Space Station (ISS):
1.
Dennis
Tito (American) – 2001, 8 days, $20 million
2.
Mark
Shuttleworth (South African/British) – 2002, 11 days, $20 million
3.
Gregory
Olsen (American) – 2005, 11 days, $20 million
4.
Anousheh
Ansari (American/Iranian) – 2006, 12 days, $20 million
5.
Charles
Simonyi (American/Hungarian) – 2009, 14 days, $35 million
6.
Richard
Garriott (American/British( - 2008, 12 days, $30 million
7.
Guy
Laliberté (Canadian) – 2009, 11 days, $40 million