From supermarket to dome control. (bar code technology used to line up observatory dome's slit)

Science News | April 5, 1986 | Copyright

From supermarket to dome control

Practically every supermarket product carries a striped patch that can be read by a laser detector at the checkout counter. This code allows a store's computer to identify the product. A modified form of this technology is now showing up in astronomical observatories--to keep a dome's slit properly lined up with the observatory's telescope.

At many observatories, astronomers no longer endure chilly nights standing at a telescope's eyepiece. Instead, they work in comfortable control rooms that may be miles away. But when ...

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