<Tr> <Td> </Td> <Td> Look up barycenter in Wiktionary, the free dictionary . </Td> </Tr> <P> The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit . It is an important concept in fields such as astronomy and astrophysics . The distance from a body's center of mass to the barycenter can be calculated as a simple two - body problem . </P> <P> In cases where one of the two objects is considerably more massive than the other (and relatively close), the barycenter will typically be located within the more massive object . Rather than appearing to orbit a common center of mass with the smaller body, the larger will simply be seen to wobble slightly . This is the case for the Earth--Moon system, where the barycenter is located on average 4,671 km (2,902 mi) from the Earth's center, well within the planet's radius of 6,378 km (3,963 mi). When the two bodies are of similar masses, the barycenter will generally be located between them and both bodies will follow an orbit around it . This is the case for Pluto and Charon, as well as for many binary asteroids and binary stars . It is also the case for Jupiter and the Sun, despite the thousandfold difference in mass, due to the relatively large distance between them . </P> <P> In astronomy, barycentric coordinates are non-rotating coordinates with the origin at the center of mass of two or more bodies . The International Celestial Reference System is a barycentric one, based on the barycenter of the Solar System . </P>

Where is the barycenter located when binary stars have similar masses
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