Refshaleøen is a former industrial site in the harbor of Copenhagen, Denmark, originally on a separate island but now annexed to the larger island of Amager. For more than a hundred years, it was home to the shipyard Burmeister & Wain, which closed in 1996.

Copenhagen Suborbitals is a crowd-funded human space program. It has flown six home-built rockets and capsules since 2011. The organization successfully launched its Nexø II rocket in the summer of 2018. Its stated goal is to have one of its members reach space on a sub-orbital spaceflight. The organization was founded by Kristian von Bengtson and Peter Madsen.