Scientists Discover Planetary System Similar to Our Own

An international team of scientists has discovered a planet and star that may share the same relationship as Jupiter and our Sun, the closest comparison that researchers have found since they began their search for extra-solar planets nearly a decade ago. By analyzing light spectra collected with the 3.9-meter Anglo-Australian Telescope in Siding Spring, Australia, scientists from the United States, Australia, and Britain made precision measurements of the star HD 70642.

Gravity test confines string theory

Researchers have conducted the most sensitive search to date for gravitational-strength forces between masses separated by only twice the diameter of a human hair, but they have observed no new forces. The results rule out a substantial portion of parameter space for new forces with a range between one-tenth and one-hundredth of a millimeter, where theoretical physicists using string theory have proposed that “moduli forces” might be detected, according to the researchers.