Brussels is the capital of Belgium, and Belgium is a country in North-Western continental Europe (only "north" if you don't take into account the Scandinavian Peninsula). It's located between Germany and France.
Within Belgium, Brussels is located in the middle of the country.
optical telescope (Hubble), X ray telescope ( Chandra) etc.
get around the Earth's atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.