Back to Article List From the December 2008 issue Ask Astro web extra: How many planets have been discovered beyond Pluto? Associate Editor Daniel Pendick explains why there are no "official" planets beyond Neptune in our solar system. By Astronomy Staff | Published: December 29, 2008
Science Ask Astro: If gravity is the weakest fundamental force, why is the Sun’s gravity so far-reaching?
Exotic Objects, Galaxies Astronomers detected two major targets with a single telescope – a mysterious signal and its source galaxy
Human Spaceflight, Science Ask Astro: How fast could a ship reach light-speed without crushing its human occupants?
