found to be associated with the warm dust belt, two concentrations of icy material were found in the system. The first belt lies between 4 and 9 AU, and is at the equivalent position of the solar system's asteroid belt, while the second belt is even farther out between 30 and 80 AU, where the solar system's Kuiper Belt would lie. This material may be the source of future water for the rocky planet at 1.8 AU if and when it completes its formation. There may also be gas giant planets in this system, already formed (in the first 1-5 Myrs) before the current era of rocky planet formation. While none have been detected to date, by analogy with the Solar System, their presence is likely, since evidence for analogues of the Solar System's asteroid belt, Kuiper belt, and terrestrial planets have been found. HD 113766 B The star system was first identified as being potentially interesting by Backman et al. using observations made by the Infrared Astronomical Satellite (IRAS) in 1983. Later measurements in 2001 by a team led by Meyer et al. determined that the system was actually a close binary, with the second star in the system, HD 113766 B, a near twin of HD 113766 A orbiting approximately 170 AU from the A star where the terrestrial planet is forming. Located at more than 4 times the distance of Pluto from the Sun, HD 113766 B has almost no effect on the material orbiting close to HD 113766 A. Similar star systems Binary star systems are common, found more frequently than single star systems like the Sun's. The arrangement of HD 113766, a binary star system with a protoplanetary disk around one star, is somewhat similar to the one-half of the system HD 98800, which has been reported to have a large amount of warm dust mass at the equivalent distance of the Solar System's asteroid belt. It is not currently known why both of these star systems should have such configurations; i.e. a protoplanetary disk around part of the system while other stars in the system lack one. References Further reading Full paper at arXiv.org Durchmusterung objects 113766 Centaurus (constellation) Binary stars Circumstellar disks F-type main-sequence stars 063975