As much as half of the gas mass in our Galaxy's dark matter halo may reside not in the galaxy itself, but in the surrounding volume, the circumgalactic medium (CGM). The vast gas content of the CGM, loosely defined as the volume immediately outside the galaxy but inside the dark...
Of the thousands of planetary candidates discovered by the Kepler mission, roughly a third are in known multiple transiting-planet systems. High-multiplicity Kepler systems (referred to as Kepler Multis) are often tightly packed and may be on the verge of instability. Many systems of this type could have experienced past instabilities,...