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March 2010
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Upcoming Events
03-11    Globe at Night Campaign
03-11    Kelly Elementary
03-12    Monthly Meeting
03-12    Globe at Night Campaign
03-13    Globe at Night Campaign
Updated: 3/11/2010 10:56:41 AM

von Kármán Lecture Series
Using NASA Satellites to Study the Earth's Climate
Presented by Dr. Eric J. Fetzer
Jet Propulsion Laboratory, California Institute of Technology
Tune in at 9 p.m. CST on Thursday, March 18, 2010
and again on
Friday, March 19, 2010
(requires RealPlayer).

Lecture archives

Current Lunar Phase
Current Moon Phase
Courtesy: U.S. Naval Observatory

Current Sun
Current Sun Image
Courtesy: National Solar Observatory

Weather
San Antonio Clear Sky Chart Sun/Moon Rise/Set Times
Click for San Antonio International, Texas Forecast

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Member of the International Dark-Sky Association

Night Sky Network
Member of NASA's
Night Sky Network


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Humor


"Lodriguss' Laws of Astrophotography"

Jerry Lodriguss is an excellent astrophotographer and wonderful storyteller. Check his website for more stories, observations and humour.

  • "It's always clear at full moon."
  • "If it's completely clear all day, it will be cloudy that night."
  • "Three mutually exclusive things: not having to go to work the next day, no clouds, no moon."
  • "If it's clear with no moon, it will be bitterly cold and the wind will be blowing like a hurricane."
  • "While manually guiding, the mount will track perfectly forever, until you look away for a second."
  • "The guiding reticle battery will always die just past the half-way point of the exposure."
  • "If you hear a strange noise and startle during an exposure, you will always bump the scope, and ruin the photo, and it will always be just before the end of a two hour exposure."
  • "Any speck of dust or dirt inside the tube assembly will end up on the film's emulsion side during the exposure."
  • "Perfect polar alignment means you will kick the tripod leg in the dark."
  • "Perfectly guided two hour exposures will be taken on x-sync shutter setting."
  • "Perfectly guided photos will be out of focus."
  • "Perfectly focused photos will have field rotation."
  • "Perfectly aligned, focused, guided, and exposed photos will be ruined by the lab."
  • "No amount of planning, practice or expertise can replace dumb luck."
  • Rain clouds gather where astronomers assemble, and scatter when the latter disperse.
  • Clear skies when polar aligning, cloudy skies just when you are ready to take the first shot.
  • Being very sure that you have packed every equipment you need for your trip, usually means that one tiny but essential screwbolt got left behind.
  • Urban development always appears at the moment when and where astronomers discover a nice dark area that no one bothered about for years.