  The recently completed PREX-2 campaign - which measured the weak form factor
of lead at an optimal momentum transfer - has confirmed that the neutron skin
of lead is relatively large and has provided a precise determination of the
interior baryon density of a heavy nucleus. In turn, the measured form factor
can be related to various nuclear and neutron-star properties. Astrophysical
observations by the NICER mission have benefited from improvements in flux,
energy resolution, and notably, timing resolution. NICER has the capability to
measure pulse profile data, which enables simultaneous mass-radius
determinations. During the next decade, measurements in astrophysics,
gravitational wave astronomy, and nuclear physics are expected to provide a
wealth of more precise data. In this review we provide an overview of the
current state of neutron skin measurements and offer insights into the
prospects for the future.
