Astrophysics with New Horizons: Making the Most of a Generational Opportunity
Michael Zemcov, Iair Arcavi, Richard Arendt, Etienne Bachelet, Ranga, Ram Chary, Asantha Cooray, Diana Dragomir, Richard C. Henry, Carey Lisse,, Shuji Matsuura, Jayant Murthy, Chi Nguyen, Andrew R. Poppe, Rachel Street,, and Michael Werner

TL;DR
The paper discusses leveraging NASA's New Horizons spacecraft beyond its primary mission to conduct unique astrophysical observations from the outer solar system, enabling studies impossible from Earth.
Contribution
It proposes a detailed observational strategy for using New Horizons for astrophysics in an extended mission beyond 50 au, highlighting its potential for transformative science.
Findings
Potential to study cosmic background light and UV background.
Ability to characterize dust, ice, and transiting exoplanets in the outer solar system.
Capability to measure dark objects via gravitational microlensing.
Abstract
The outer solar system provides a unique, quiet vantage point from which to observe the universe around us, where measurements could enable several niche astrophysical science cases that are too difficult to perform near Earth. NASA's New Horizons mission comprises an instrument package that provides imaging capability from ultraviolet (UV) to near-infrared (near-IR) wavelengths with moderate spectral resolution located beyond the orbit of Pluto. A carefully designed survey with New Horizons can optimize the use of expendable propellant and the limited data telemetry bandwidth to allow several measurements, including a detailed understanding of the cosmic extragalactic background light; studies of the local and extragalactic UV background; measurements of the properties of dust and ice in the outer solar system; confirmation and characterization of transiting exoplanets; determinations…
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