  The POLAR Investigation of the Sun (POLARIS) mission uses a combination of a
gravity assist and solar sail propulsion to place a spacecraft in a 0.48 AU
circular orbit around the Sun with an inclination of 75 degrees with respect to
solar equator. This challenging orbit is made possible by the challenging
development of solar sail propulsion. This first extended view of the
high-latitude regions of the Sun will enable crucial observations not possible
from the ecliptic viewpoint or from Solar Orbiter. While Solar Orbiter would
give the first glimpse of the high latitude magnetic field and flows to probe
the solar dynamo, it does not have sufficient viewing of the polar regions to
achieve POLARIS' primary objective : determining the relation between the
magnetism and dynamics of the Sun's polar regions and the solar cycle.
