astronomy Getting to know 2015 TG 387, aka "the Goblin," an unconfirmed dwarf planet lurking in the Ort cloud Gareth Branwyn
Science Excellent animation comparing the rotations of the planets in our solar system David Pescovitz
Space Very beautiful (and very expensive) watch contains mechanical solar system model David Pescovitz
Science First near-Earth-size planet in “habitable zone” around sun-like star confirmed by NASA Xeni Jardin
Space Pluto and other known “not-planets” in our solar system mapped in scale image montage Xeni Jardin