This graph shows the declining costs of launching people and cargo into space. The figures provided here, adjusted for inflation, are for U.S. launch vehicles delivering 1 kg (2.2 lb) into low Earth orbit (LEO).

Traditionally, access to space has been extremely expensive. However, prices continue to fall with each passing decade as new technologies are developed and the sector becomes more commercialised. SpaceX, for example, has demonstrated the potential of reusable rockets. Other advances in the future may include lighter materials, the use of inflatable modules, new fuel types, space planes and/or more efficient engines.

If the overall trend continues, access to space may become relatively affordable to most people during the second half of this century. Visiting a space hotel could one day be as routine as a holiday overseas.

NASA has stated a long-term goal of making LEO accessible for tens of dollars per kilogram by 2040. The agency has also speculated that a space elevator (requiring 15 years to construct) would lower this cost even further, to just a few dollars per kilogram.

Image credits:

1981 – NASA

1995 – NASA

2006 – SpaceX [CC-BY-SA-3.0]

2016 – NASA

2017 – Official SpaceX Photos (Bangabandhu Satellite-1 Mission) [CC0 or CC0], via Wikimedia Commons

2020 – SpaceX

2040 – Space X

2060 – NASA