The relative size of the inner planets of our solar system: Mercury, Venus, Earth and Mars. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Large radial velocity surveys have been ongoing on these different instruments and have yielded a whole population of exoplanets of all kinds, from hot Jupiters to systems of Neptune-like objects to ...