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Fraser
2005-Sep-12, 09:07 PM
SUMMARY: A common science experiment for young kids is to build a pinhole camera. Researchers from the University of Colorado at Boulder think NASA should build a gigantic one in space and use it to find planets orbiting other stars. The "New Worlds Imager" would be a football field-sized opaque light shade with a small opening right at the centre to let light through. A detector spacecraft would sit thousands of kilometres back and collect the light that comes through the opening. The shade would block the light from the star and let astronomers detect planets orbiting it. The proposal was one of 12 advanced concepts recently selected for further study by NASA.

View full article (http://www.universetoday.com/am/publish/biggest_pinhole_camera_ever.html)
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Fortis
2005-Sep-12, 10:56 PM
Sounds tricky. I would guess that the small aperture would require an increased exposure/integration time to be able to see planets, which presumably would put severe constraints on the ACS and station keeping of the detector spacecraft. (Maybe you could use a 2-d focal plane and do an emulated form of TDI?)

It'd all look very impressive though. :)