X-ray Observation of Mars with Suzaku at Solar Minimun
X-rays from Saturn: A study with XMM-Newton and Chandra over the years 2002-05
X-rays from solar system objects
XO-2b: a Prograde Planet with a Negligible Eccentricity, and an Additional Radial Velocity Variation
XV International Conference on Gravitational Microlensing: Conference Book
XX. CoRoT-20b: A very high density, high eccentricity transiting giant planet