If the collecting area is in pieces, the effective diameter (the distance between the two most widely spaced pieces) can be several thousand kilometres.
It works because the maximum resolution of a telescope (the minimum angle apart that two points need to be for the telescope to see them as separate) depends on its diameter, not its collecting area.
However, he says that in the 15 years he has been collecting in this area, the market has grown significantly.
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Latin American art is an area of collecting with great possibility for both new and seasoned art collectors.
But in this specialized area of collecting, subject matter is top dog, while quality often plays second fiddle.
She told the Today programme's Justin Webb that while she was collecting data in the area, she began to have "excruciating pain" with her wisdom teeth and without access to a dentist.
Collecting the ball on the edge of the area, and with the Juve defence backing off, Dempsey produced a stunning chip that floated over Chimenti and into the far top-corner of the goal.
Earlier this year a total ban on mushroom-collecting was imposed in southern England's New Forest area after an invasion of commercial pickers.
Its soldiers conducted a thorough census that mapped the 3, 500 households in its area of operations, photographing all male inhabitants and collecting their grievances.
Although the water supply in this area was reasonable enough, there was no system for collecting sewage, so it gathered in the streets, causing obnoxious smells and diseases.
Exeter has been collecting rubbish fortnightly in some parts of the city for several years and last September increased the area covered to include another 14, 000 households.
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