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Trick or treat: Here's where to find comets Lemmon, SWAN and 3I/ATLAS in the Halloween sky

Here's where Comet 3I/ATLAS, Lemmon and SWAN are in the Halloween sky.

Using this handy laser tape measure for only a few minutes had me hooked - here's why

Take tape measures, once a palm-sized object that housed a metal ribbon that could snap back enthusiastically -- has been transformed into a palm-sized device with with a laser inside. Yup, the ...