Mass Determined for 60 Exoplanets

“An astronomer reports having measured the masses of approximately 60 exoplanets larger than Earth and smaller than Neptune. The measurements greatly expand scientists’ knowledge of sub-Neptune exoplanets because once the mass and size of a planet are known, the density can be determined and the composition of the planet inferred.”

<a href=”http://www.sciencedaily.net/releases/2014/01/140108133311.htm”>http://www.sciencedaily.net/releases/2014/01/140108133311.htm</a>