  Leveraging advancements in micro-scale technology, we propose a fleet of
autonomous, low-cost, small solar sails for interplanetary exploration. The
Berkeley Low-cost Interplanetary Solar Sail (BLISS) project aims to utilize
small-scale technologies to create a fleet of tiny interplanetary
femto-spacecraft for rapid, low-cost exploration of the inner solar system.
This paper describes the hardware required to build a nearly 10 g spacecraft
using a 1 m$^2$ solar sail steered by micro-electromechanical systems (MEMS)
inchworm actuators. The trajectory control to a NEO, here 101955 Bennu, is
detailed along with the low-level actuation control of the solar sail and the
specifications of proposed onboard communication and computation. Two other
applications are also shortly considered: sample return from dozens of
Jupiter-family comets and interstellar comet rendezvous and imaging. The paper
concludes by discussing the fundamental scaling limits and future directions
for steerable autonomous miniature solar sails with onboard custom computers
and sensors.
