SwRI Scientists Predict New Horizons Reaches Solar System Boundary by 2029-2040
Updated
Updated · Gizmodo · Jul 8
SwRI Scientists Predict New Horizons Reaches Solar System Boundary by 2029-2040
3 articles · Updated · Gizmodo · Jul 8
Summary
Two new studies estimate NASA’s New Horizons could hit the solar system’s termination shock as early as 2029 or as late as 2040, giving mission planners a window to prepare instruments and data downloads.
The wide range reflects the heliosphere’s shifting outer edge: the Sun’s 11-year activity cycle makes the protective plasma bubble expand during solar maximum and contract during solar minimum.
Researchers say New Horizons, now about 5.9 billion miles from Earth after waking from a year-long hibernation in late June, could even cross that boundary more than once as conditions change.
Only Voyager 1 and Voyager 2 have previously passed beyond the heliosphere—doing so in 2012 and 2018—making New Horizons a potential third probe to sample the transition toward interstellar space.
The forecast extends New Horizons’ post-Pluto and Arrokoth mission from Kuiper Belt exploration toward a broader goal: mapping where the Sun’s influence ends and informing future interstellar travel.
As our Sun's behavior changes, will New Horizons find a solar boundary completely different from what Voyager saw?
With New Horizons' power fading, can new nuclear tech propel the next probe even deeper into interstellar space?
New Horizons Approaches the Solar System’s Boundary: Measuring the Heliosphere’s Edge and the Path to Interstellar Space
Overview
NASA's New Horizons spacecraft, after awakening from hibernation in July 2026, is now traveling about 5.9 billion miles from Earth in the Kuiper Belt. To conserve resources, it spent nearly a year in hibernation before resuming its mission. New Horizons is pushing the boundaries of exploration as it navigates the outer regions of our solar system, preparing for a historic crossing into interstellar space. Its journey will take it beyond the heliosphere—a vast bubble of plasma created by the Sun's solar wind—marking the point where the Sun's influence ends and interstellar space begins.