Weekly Space Hangout - May 17, 2012 Weekly Space Hangout - May 3, 2012 Ep. 259: Exploration of Venus Ep. 258: Viking Landers Ep. 257: Viking Orbiters Ep. 256: Resolution Weekly Space Hangout - Mar 8, 2012 Ep. 255: Observing Hydrogen Weekly Space Hangout - Mar 1, 2012 Ep 254: Reflection and Refraction Weekly Space Hangout - Feb 23, 2012 Ep. 253: Rayleigh Scattering Weekly Space Hangout - Feb 16, 2012 Ep. 252: Heisenberg Uncertainty Principle Weekly Space Hangout - Feb 9, 2012 Ep. 251: Messier Catalog Weekly Space Hangout - Feb 2, 2012 Ep. 250: Precision