Stoking the star-maker machinery
Karen A. Newman
They’re making stars in Chile, Huck,
and it did take a long time – about 10 years – but overnight on Jan.
21-22, there were five new stars in the Southern sky. You wouldn’t have been
able to see them with your eyes, but they were there.
Forgive me for mixing my cultural references, but with apologies
to Joni Mitchell and Mark Twain, their words just seem to fit. The team at the Gemini
South telescope in Chile successfully propagated a 50-W laser producing five laser
guide stars, as we reported at Photonics.com on Feb. 2. The new constellation will
be used to sample atmospheric turbulence for the Gemini Observatory’s GeMS
adaptive optics.
GeMS, for Gemini Multi-Conjugate Adaptive Optics System, will
allow relatively wide-field imaging at extremely high resolution over an exceptionally
large portion of the sky. The system is expected to provide very sharp images of
similar quality to those obtained from space. For an explanation of multiconjugate
adaptive optics and how it differs from adaptive optics, see the MCAO primer at
the Gemini Observatory website (
http://sciopsedit.gemini.edu).
Those of us who marveled at the beginnings of space exploration
in the second half of the past century still gaze up at the night sky and wonder
how the stars came to be. It is exciting to think that the work going on at the
Gemini Observatory may bring us closer to an answer for Huck and Jim, and for all
of us.
According to the Gemini South team, technical tests of the laser
and the GeMS will continue throughout 2011 and are expected to be available for
scientific use next year. The days ahead at Chile’s Aura Observatory are sure
to be filled with exciting events that will be anticipated and celebrated, and we’ll
look forward to amazing images and new knowledge about our universe in the years
ahead.
Looking ahead just a little, you will find Photonics Media this
month at OFC/NFOEC in Los Angeles on March 6-10; at Pittcon in Atlanta on March
13-18; and at Automate in Chicago on March 21-24. I myself will be at Automate,
checking out all the latest advances in machine vision. I hope to see you there.
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