Troisdorf

Troisdorf station is a railway junction in the town of Troisdorf in the German state of North Rhine-Westphalia, where the line from Cologne separates into the East Rhine Railway to Neuwied and the Sieg Railway to Siegen. In addition to various regional rail services Troisdorf is served by the S 12 and S 13. Both lines operate towards Cologne at 20-minute intervals, so together they provide a 10-minute-interval S-Bahn service to Cologne. It is also served on working days by the S 19 service between Düren and Au (Sieg), running hourly and substituting for one of the S13 services. It is classified by Deutsche Bahn as a category 3 station.The Cologne–Frankfurt high-speed line also passes through Troisdorf, but without stopping. In the course of the construction of high-speed line, the three platforms were rebuilt and raised. Renovation or replacement of the station building is being planned.

The Agger is a river in Germany, a right tributary of the Sieg in North Rhine-Westphalia. It is 69.5 kilometres (43.2 mi) long. Its source is in the Sauerland hills, near Meinerzhagen. It winds through the towns Engelskirchen, Overath and Lohmar. Near Siegburg the Agger flows into the Sieg.

Siegburger Mühlengraben is a small canal of North Rhine-Westphalia, Germany. It branches off the Sieg, flows through Siegburg, and joins the Sieg again.

Spich station is a railway junction in the district of Spich of the town of Troisdorf in the German state of North Rhine-Westphalia, on the Sieg Railway. It is served by the S12 and S13. Both lines operate at 20-minute intervals, so together they provide a 10-minute interval S-Bahn service to Cologne. It is also served by the S19 service between Düren and Au (Sieg), running hourly and substituting for one of the S13 services. It is classified by Deutsche Bahn as a category 4 station.The Cologne–Frankfurt high-speed line also passes through Spich, but without stopping.

The European Astronaut Centre (EAC) (German: Europäisches Astronautenzentrum, French: Centre des astronautes européens), is an establishment of the European Space Agency and home of the European Astronaut Corps. It is near to Cologne, Germany, and is subdivided into six separate arms, these being Astronaut Training, Space Medicine, Astronaut Management, Human Exploration of the Moon as part of the Spaceship EAC initiative and Communications. It provides training facilities for European and international partner astronauts (including a neutral buoyancy pool), particularly regarding ESA hardware for the ISS such as Columbus and formerly the ATV. The overall European Astronaut Centre organisation is also in charge of the organisation of the training of European astronauts in the centers of other partners, such as the United States (NASA Johnson Space Center), Russia (Star City), Canada (Saint-Hubert) or Japan (Tsukuba). The Medical Operations arm (the Crew Medical Support Office) concentrates on providing health related support to the European astronauts and their families. Astronaut management supports and directs the careers and mission placements of the astronauts, and Education and PR are involved in activities related to education and outreach and the appropriate representation of the European astronauts and their space activities to the public.

The Hochschule Bonn-Rhein-Sieg University of Applied Sciences is a German university of applied sciences with more than 9,500 students and 150 professors. Its campus comprises three distinct locations, situated in Sankt Augustin, Rheinbach and Hennef / Sieg (all in the vicinity of Cologne and Bonn).

The European transonic wind tunnel (ETW) is a high-Reynolds-number transonic wind tunnel using nitrogen as test gas. It is one of the world's largest cryogenic wind tunnels. It is situated in Cologne, Germany. ETW was constructed and is operated by the four European countries France, Germany, Great Britain and The Netherlands. The ETW is in operation since 1994.ETW provides real-flight Reynolds numbers by virtue of both increased pressure and decreased temperature. Independent variation of Reynolds number and aero elastic loading can be done there. They specialize in Flight Reynolds number testing for full-span and semi-span models at cruise conditions and extreme borders of flight envelope.

The German Aerospace Center (German: Deutsches Zentrum für Luft- und Raumfahrt e.V., abbreviated DLR, literally German Center for Air- and Space-flight) is the national center for aerospace, energy and transportation research of Germany, founded in 1969. It is headquartered in Cologne with 35 locations throughout Germany. The DLR is engaged in a wide range of research and development projects in national and international partnerships.The DLR acts as the German space agency and is responsible for planning and implementing the German space programme on behalf of the German federal government. As a project management agency, DLR coordinates and answers the technical and organisational implementation of projects funded by a number of German federal ministries. As of 2020, the German Aerospace Center had a national budget of €1.348 billion.

The Steyler Bank GmbH is an ethical-ecological bank and a Christian finance of the Steyler Missionare. It was founded in 1964 in Sankt Augustin, where it still has its headquarters, and creates funds from an ethical point of view. The Steyler Bank also has a branch in Austria. The Steyler Bank is a private bank in the legal form of a limited liability company and has share capital of around €2.5 million. The passive business is primarily operated for private and institutional clients. The focus is on investment advice and asset management. As bank of the Steyler Missionsorden, it is also committed to the missionary mission, justice, peace, and the integrity of creation. It also offers foundation advisory services and currently manages 197 trustee foundations (as of 2013).

Auelsbach is a river of North Rhine-Westphalia, Germany. It flows into the Agger in Lohmar.

Siegburg (i.e. fort on the Sieg river; Ripuarian: Sieburch) is a city in the district of Rhein-Sieg-Kreis in North Rhine-Westphalia, Germany. It is located on the banks of the rivers Sieg and Agger, 10 kilometres from the former seat of West German government Bonn and 26 kilometres from Cologne. The population of the city was 39,192 in the 2013 census.

Cologne Bonn Airport (German: Flughafen Köln/Bonn Konrad Adenauer) (IATA: CGN, ICAO: EDDK) is the international airport of Germany's fourth-largest city Cologne, and also serves Bonn, the former capital of West Germany. With approximately 12.4 million passengers passing through it in 2017, it is the seventh-largest passenger airport in Germany and the third-largest in terms of cargo operations. By traffic units, which combines cargo and passengers, the airport is in fifth position in Germany. As of March 2015, Cologne Bonn Airport had services to 115 passenger destinations in 35 countries. The airport is named after Cologne native Konrad Adenauer, the first post-war Chancellor of West Germany. The airport is located in the district of Porz and is surrounded by Wahner Heide, a nature reserve. The airport is centrally located in the Cologne Bonn Region 12 km (7.5 mi) southeast of Cologne city centre and 16 km (9.9 mi) northeast of Bonn. Cologne Bonn Airport is one of the country's few 24-hour airports and serves as a hub for Eurowings, FedEx Express and UPS Airlines as well as a focus city for several leisure and low-cost airlines. It is also a host of the German and European space agencies DLR and EAC, part of ESA, which train astronauts there for space explorations. Cologne Bonn airport is only 49 km (30 mi) south of larger Düsseldorf Airport, the main airport of Rhine-Ruhr, and also competes with Frankfurt Airport, Germany's major international airport, which can be reached from Cologne within 47 minutes by the ICE high-speed train. The airport is jointly owned by the City of Cologne (31.12%), the Federal Republic of Germany (30.94%), the State of North Rhine-Westphalia (30.94%), the City of Bonn (6.06%) and two counties: Rhein-Sieg-Kreis (0.59%) and Rheinisch-Bergischer Kreis (0.35%).