THIS DAY IN SCIENCE: There's A Face on Mars (Viking 1) in 1976

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Using Parallax: How Far is that Star?

Using Parallax: How Far is that Star?

Introduction Since the distances to the stars cannot be measured directly, astronomers use a variety of techniques including triangulation and parallax, comparison of absolute and apparent magnitude, and Cepheid variables. Triangulation is an indirect method of...
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