EXTRASOLAR PLANETS
X-3 Proxima Centauri.
X-4 psr 1257+12.
X-5 Rogue planet.
X-6 Tau Bootes.
X-7 Upsilon Andromeda b.
X-8 Solar system comparison chart.
X-2 Sunrise on HD 188753 ab.
X-1 "Super Earth"---
mu Arae b.
