Solar System What effect, if any, do the objects in the Kuiper Belt and Oort Cloud have on the orbits or characteristics of the eight major planets?
Deep-Sky Objects, Exotic Objects, Stars How can scientists distinguish between planetary nebulae and supernova remnants?
Exoplanets, Human Spaceflight, Planets, Robotic Spaceflight, Solar System, Space Exploration The Week in Pictures: August 17–23, 2013
