Starts with the tiniest dwarf planets of our solar system, then continues with large planets, dwarf stars, stars giant/supergiant/hypergiant stars, nebulae, globular clusters and galaxies.
There is the famous VY Canis Majoris rated as the biggest star known, but very few know that that the incredible IC 1101 is the largest known object in the entire universe. Only galaxy clusters are bigger than it.
A team of NASA-funded researchers find there may be different criteria by which we search for life elsewhere in the universe. Also, shuttle Discovery gets a new target launch date; SOFIA flies its first science mission; NASA's Small Business Awards, and an alternative fuels pilot program. Plus, Scott Kelly's geography trivia from space, and the anniversary of Gemini 7.