อ้างอิง ของ สเปซชิปทู

  1. ↑ "sRLV platforms compared". NASA. 7 March 2011. สืบค้นเมื่อ 10 March 2011. SpaceShipTwo: Type: HTHL/Piloted
  2. ↑ Amos, Jonathan (8 December 2009). "Richard Branson unveils Virgin Galactic spaceplane". BBC News. สืบค้นเมื่อ 23 March 2010.
  3. ↑ "Sir Richard Branson's Virgin Galactic spaceship ignites engine in flight". BBC. 29 April 2013. สืบค้นเมื่อ 29 April 2013.
  4. ↑ "Space Ship Completes 24th Test Flight in Mojave". HispanicBusiness.com. 4 April 2013. Archived from the original on 30 December 2013. สืบค้นเมื่อ 5 April 2013. Unknown parameter |deadurl= ignored (help)
  5. ↑ "Virgin Galactic to Launch Passengers on Private Spaceship in 2013". Space.com. 8 June 2012. สืบค้นเมื่อ 11 June 2012.
  6. ↑ "Virgin Galactic space tourism could begin in 2013". BBC. 26 October 2011.
  7. ↑ John Schwartz (23 January 2008). "New Tourist Spacecraft Unveiled". New York Times. สืบค้นเมื่อ 23 January 2008.
  8. ↑ Fly With Us. Virgin Galactic. Retrieved 5 November 2015.
  9. ↑ "Virgin spaceship aims to be science lab". BBC. 4 December 2012. สืบค้นเมื่อ 4 December 2012.
  10. ↑ Chang, Kenneth; Schwartz, John (31 October 2014). "Virgin Galactic's SpaceShipTwo Crashes in New Setback for Commercial Spaceflight". New York Times. สืบค้นเมื่อ 1 November 2014.
  11. ↑ Foust, Jeff (2014-10-31). "SpaceShipTwo Destroyed in Fatal Test Flight Accident". Space News. สืบค้นเมื่อ 2014-10-31.
  12. ↑ "Virgin Galactic's SpaceShipTwo Crashes During Flight Test". October 31, 2014.
  13. ↑ Durden, Rick (31 October 2014). "Virgin Galactic's SpaceShipTwo Crashes". AVweb. สืบค้นเมื่อ 31 October 2014.
  14. ↑ Chang, Kenneth (November 3, 2014). "Investigators Focus on Tail Booms in Crash of Space Plane". New York Times. สืบค้นเมื่อ November 3, 2014.
  15. ↑ Melley, Brian (November 3, 2014). "Spaceship's descent device deployed prematurely". AP News. สืบค้นเมื่อ November 3, 2014.
  16. ↑ "Virgin Galactic's SpaceShipTwo rocket plane crashes". October 31, 2014.
  17. ↑ "New SpaceShipTwo Rollout Friday". AVweb. สืบค้นเมื่อ 19 February 2016.
  18. ↑ "Virgin Galactic unveils new space tourism rocket plane". CBC News. 19 February 2016. สืบค้นเมื่อ 20 February 2016.
  19. ↑ Weston Williams (5 December 2016). "Space tourism: Virgin Galactic makes successful glide test". Christian Science Monitor. สืบค้นเมื่อ 5 December 2015.
  20. ↑ "Update from Mojave: Testing Testing 1-2-3". Virgin Galactic. 2016-03-10. สืบค้นเมื่อ 2016-03-15.
  21. ↑ "Update from Mojave: VSS Unity's First Flight Test Completed - Virgin Galactic". virgingalactic.com. 9 September 2016. สืบค้นเมื่อ 12 September 2016.

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