Version 4.3.0 is available upstream. Please consider updating! It seems that version 4.3.0 is available upstream, while the latest version in the Gentoo tree is 4.2.0-r1. You think this warning is false? Read more about it here.
Xephem is an interactive astronomical ephemeris program for X Windows
systems. It computes heliocentric, geocentric and topocentric
information for fixed celestial objects and objects in heliocentric
and geocentric orbits; has built-in support for all planet positions;
the moons of Jupiter, Saturn and Earth; Mars' and Jupiter's central
meridian longitude; Saturn's rings; and Jupiter's Great Red Spot.