Nautilus aims to bring innovation to the space exploration market by providing a modular service for interplanetary navigation of small satellites. Applies the Small Satellites philosophy to the Operational Ground Segment by privatising deep space flight dynamics activities. The aim is to offer public and private customers cheap, tailor-made flight dynamics services for SmallSats. This substantial cost reduction will drastically change the perception of deep space missions, opening a new chapter in the New Space Economy.