The Eye with Which the Universe Beholds Itself

For fifteen years, Earth has had a scientific station on an exoplanet orbiting Gliese 876, humanity's only presence outside the Solar System. But a new and powerful telescope at L5 can detect no evidence of Phaeton Base, even though it should be able to do so. So the US has sent Colonel Bradley Elliott, USAF, to investigate. Twenty years before, Elliott was the first, and to date only, man to land on the Martian surface. What he discovered there gave the US the stars, but it might also be responsible for the disappearance of Phaeton Base...