Exoplanets, Planets, Solar System Is Venus always either a “morning star” or an “evening star” during certain times of the year?
Science In the Large Hadron Collider, two streams of protons travel in opposite directions at near light-speed before they collide with each other. Does this mean that the two particle streams are moving at nearly twice the speed of light relative to each other?
Solar System How do scientists predict the orbit and apparent “peak” magnitude of an incoming comet such as Comet ISON (C/2012 S1) when it is far from Earth?
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?
