New Horizons Wakes Up, Prepares for 'Termination Shock'

Key Points:

• NASA's New Horizons spacecraft recently woke up from its longest hibernation of 321 days and is currently about 5.9 billion miles from Earth, traveling through the Kuiper Belt toward the edge of the heliosphere.
• The heliosphere is a protective bubble created by the sun's charged-particle wind, shielding the solar system from high-energy galactic radiation, with its outer boundary, the termination shock, estimated to be crossed by New Horizons between 2029 and 2040.
• Unlike the Voyager 1 and 2 missions, which crossed this boundary earlier but had less sophisticated instruments, New Horizons carries advanced scientific tools that could provide new insights into where the sun's influence ends.
• Data collected by New Horizons as it approaches and crosses the termination shock will help space physicists better understand the heliosphere's dynamics and inform future interstellar mission planning.
• New Horizons' mission has included significant milestones such as a 2007 Jupiter flyby, the 2015 Pluto system exploration, and the 2019 Kuiper Belt object Arrokoth flyby, with ongoing studies of the sun’s outer heliosphere and other Kuiper Belt objects.