Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Some astronomers don't like stars. Bright star fluctuations can indicate how the Earth's atmosphere is changing, but many times no bright star exists in the direction where atmospheric information is needed. Subsequent observations of the artificial laser guide star can reveal information so detailed about the blurring effects of the Earth's atmosphere that much of this blurring can be removed by rapidly flexing the mirror. Above , an artificial star was created with a four-watt laser at Richard B. Dunn Solar Telescope on Sacramento Peak in New Mexico .
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