A reader from Jackson, Mo., asks, "How do astronomers know the distances to the various objects they talk about?" The answer is that astronomers use a "boot strap" process to determine distances over ...
While our Sun prefers to go solo, many other stars are parts of binary systems, with a pair of stars gravitationally bound to each other. In some cases, the stars are far enough apart that planets can ...
“Space is big. Really big,” one could say with no exaggeration, as the vast distances between stars sometimes bring a surprise visitor less than a light-year away, making possible its ...
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