Using the ultra-precise HARPS spectrograph on ESO’s 3.6-m telescope at La Silla (Chile), a team of European astronomers have discovered that a nearby star is host to three Neptune-mass planets. The innermost planet is most probably rocky, while the outermost is the first known Neptune-mass planet to reside in the habitable zone. This unique system is likely further enriched by an asteroid belt. [TD bgColor=#336699][SPAN class=imagecaption][STRONG][EM][FONT color=#ffffff]Artist's rendering of Orbital's Hybrid Launch Vehicle (HLV) in flight (Photo: Business Wire).[/FONT][/EM][/STRONG][STRONG][EM][FONT color=#ffffff] [/FONT][/EM][/STRONG][/SPAN][/TBODY][/TABLE][/P][P]“For the first time, we have discovered a planetary system composed of seve. . .