Using NASA’s Kepler spacecraft on its K2 mission, astronomers have discovered five new planets around other stars, including two extraordinary companions to a subgiant star. A Neptune-mass exoplanet. Image credit: NASA / Goddard / Francis Reddy. In the January 2017 issue of the journal Monthly Notices of the Royal Astronomical Society (arXiv.org preprint), Dr. Alexis Smith from the German Aerospace Center Institute’s of Planetary Research and...
