Created by Richard W. Pogge of Ohio State University, this movie demonstrates trigonometric parallax. The top half of each frame shows the appearance of a star in the sky as seen from the Earth, and the bottom half...
"Venus 2004" is a project of the Astroinfo Society, which was organized to study and publish findings on the transit of Venus that occurred in 2004. Historically, the planet's transit across the sun has been used to...
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