Camerata Mediolanense is an Italian music collective which exists since 1994. They play neoclassical chamber music. This song is called Lacrime di Gioia which means tears of joy, although the song sounds rather sad. If you want to dive deeper into this music visit their bandcamp page.
Unbelievable that it’s been already 7 years. I was fascinated by this video when it came out – and I still am. The music is by the NOW Ensemble from New York. Enjoy this 13 minute trip to space accompanied by their wonderful neo-/indie-classical chamber music.