... Tonight's Sky . ... Stephen James O'Meara . ... James Webb Space Telescope completes cryogenic mirror test . ... Recently, six James Webb Space Telescope beryllium mirror segments completed a series of cryogenic tests at the X-ray & Cryogenic Facility at NASA's Marshall Space Flight Center in Huntsville, Alabama. ... The cryogenic test gauges how each mirror changes temperature and shape over a range of operational temperatures in space. ... Test model of James Webb Space Telescope instrument ready ...

Mark 6 16Gbps VLBI Data System Alan Whitney David Lapsley for the Mark 6 development team MIT Haystack Observatory 5 December 2011 DiFX workshop MIT Haystack Observatory 1 Mark 6 project · 16 Gbps COTS-based VLBI data system based on COTS- hardware , Linux OS, open-source software · Immediate targets ­ VLBI2010 and mm-VLBI · Mark 6 is a collaborative development effort between: ­ Haystack Observatory ­ all software and ... 22 Recording rate capability vs. time 100 Ma rk 7 ? ...

Electric Propulsion: Which One For My Spacecraft? ... Electric propulsion research is an active field going as far back as the 1920s. Flight and test experience is mentioned briefly where the literature provides data. ... Many primary authors have attempted to classify electric propulsion systems. ... However, alternate schemes divide the techniques by the means for ion production (for those that rely upon plasma generation) or by the propellant composition. ... Bye-bye solar system! ...