The small European nation of Luxembourg just made a big investment in a flourishing realm of the space industry: asteroid mining. Private companies and space agencies have been interested in mining asteroids for water and ＿＿（11）＿＿ minerals like platinum, which can be used to fuel trips to destinations deeper in space. While no one has successfully mined an asteroid yet, the Luxembourg government plans to 12 this industry through research and development projects. Luxembourg is not the only country to look up to the skies for new places to mine. In 2015, US president Barack Obama signed a law that will let American companies mine space resources. In January, the European Space Agency shared a vision for a research village on the Moon. This would be used as a ＿＿（13）＿＿ for mining companies. The US company Deep Space Industries said space resources will allow greater exploration of the solar system without the need to mind resources on Earth. ＿＿（14）＿＿ , there could be problems ahead for mining companies. The Outer Space Treaty of 1967 says that natural resources in space are part of mankind's common ＿＿（15）＿＿ . This means private companies may not be able to mine asteroids.