— Cory Doctorow (@doctorow) October 31, 2017
on: October 31, 2017 at 09:30AM
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Sky-Watcher unveiled its Stargate Truss-Tube Dobsonian Telescopes at NEAF. These large 18- and 20-inch f/4 reflectors (starting at $5,999) are constructed around conical fused-borosilicate primary and cellular secondary mirrors with 94% reflective aluminum coatings. The modular truss design divides the total weight of each scope into manageable sections that assemble quickly in the field. The base model includes a 2-inch dual-speed Crayford focuser, 9×50 finder scope, as well as 28- and 10-mm LET eyepieces. Additional accessories include three 2.3 lb. counterweights, a truss shroud, and tool-free truss clamps. Both scopes are also available with motorized Go To and a SynScan hand controller at additional cost, featuring dual encoders that permit manual slewing without losing alignment. See manufacturer’s website for additional details.
(Image: Spielvogel. Abandoned V-1 launch site in Germany’s Rhineland-Palatinate)
They may look like any other peaceful woodland ruins of days gone by. But these seemingly-anonymous concrete foundations reflect a vengeance unleashed on Britain and Belgium by Nazi Germany during World War Two. For it was from here that countless V-1 flying bombs were launched into England, with the goal of striking fear into the hearts of the civilian population.
Just after 4 am on June 13, 1944, residents in northeast London reported a strange droning sound that eerily cut out before the craft that it belonged to fell to earth. Six residents were killed in the borough of Hackney, and the ‘doodlebug’ menace had begun. In the days that followed, dozens of V-1s, or ‘buzz bombs’, as they were also dubbed, reigned down on London, killing and wounding hundreds.