Top Ten Reasons

for a

Mission to the Interstellar Medium

10) To explore the structure of the heliosphere

9) To investigate the most distant matter in the solar system
8) To investigate the interaction of the heliosphere with the interstellar medium
7) To investigate fundamental astrophysical processes in the heliosphere and the interstellar medium
6) To determine the Sun's influence on its local neighborhood
5) To explore the nature of the interstellar medium
4) To investigate the origin and evolution of matter in the nearby Galaxy
3) To provide a platform for unique astronomical observations
2) To chart the Sun's journey through the local solar neighborhood
1) Exploration is what NASA does best!