Casting Complete for Giant Magellan Telescope Mirror Four
The casting crew at the Richard F. Caris Mirror Lab at the University of Arizona has lifted the oven lid on the fourth GMT mirror to find a perfect casting. The innovative process heats 18 tons of glass to a temperature of 2,120°F in a spinning furnace with a honeycomb mold. The glass is cooled after four hours to 1,652°F, and then slowly over three months to room temperature to avoid strains in the mirror. The resulting parabolic shape, saves countless hours of polishing, and tons of glass. Photos of mirror four have been posted by the GMTO on Facebook (photo credit: Ray Bertram, Richard F. Caris Mirror Lab, University of Arizona):
The National Radio Astronomy Observatory (NRAO) will hold a one day workshop March 10th, from 9am-5pm, in the Evans Conference Room (RLM 15.202A). The workshop is open to all astronomers, in particular, those who do not regularly utilize radio data in their research. An overview of NRAO facilities, a discussion of mm interferometry, proposal preparation and submission for the ALMA Cycle 4 deadline, and data reduction and analysis will be covered. Free registration is requested, even for those attending part of the day, and by March 4 for a lunch count.
Texas regulators are asking West Texas oil and gas producers to help preserve the region’s famously starry skies.
In a notice issued Wednesday, the Texas Railroad Commission called on Permian Basin operators to curb light pollution at worksites, particularly around the University of Texas' McDonald Observatory, a destination for world-renowned astronomers in the Davis Mountains near Fort Stockton. more..
Ninth Planet? Austin's Time Warner Cable Talks with Astronomer Steven Finkelstein
Astronomers at Caltech recently made headlines suggesting the possibility of a ninth planet in our solar system. While no planet has been detected directly, models attempting to explain the strange orbits of a group of comets in the Kuiper belt, are satisfied by an undiscovered planet, about the mass of Neptune, with a highly elliptical orbit and a 20,000 year day. Assistant Professor Steven Finkelstein sifts through the possibility with Burton Fitzsimmons.