Let’s try a demonstration that we all enjoyed in elementary school. Close one eye, hold out your thumb at arm’s length, and align it with an object on the other side of the room. Without moving your ...
Through a new digital archive, the University of Pittsburgh is making six decades of astronomy research available to scientists and ambitious armchair astronomers. The archive, called the Parallax ...
Let’s try a demonstration that we all enjoyed in elementary school. Close one eye, hold out your thumb at arm’s length, and align it with an object on the other side of the room. Without moving your ...
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