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R. J. Nemiroff, B. R. Patla (Michigan Tech)
Less well known than the Sun's minimum ``opaque" focus at 550 AU is its minimum ``transparent" focus at about 25 AU. What, though, is focused there? No one knows for sure. Interestingly, this outer Solar System distance, just beyond the orbit of Uranus, is reachable with current technology. Strange thin tubes here dubbed ``hollows" might exist out there where radiations (particles) and even fields might be detectably magnified by the gravitational lens effect of the transparent Sun. We report on hollows potentially generated by the Sun and their detectability. Here recent theoretical results are reported on whether gravity itself can be enhanced creating unusual ``gravitational hollows" of slightly enhanced gravity in the outer Solar System.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.