GravityLens :: Hugh Sansom Design
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GravityLens Bush
Our Glorious Leader when he's busy destroying the world. The same as we would see him if he were removed to the far side of some distant, super-massive stellar object. A marked improvement, don't you think?

 

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MR. SIR, WHAT'S A "GRAVITYLENS"?

I'm glad you asked that, Jimmy. Let's ask Doctor Science!

"The gravity from a massive object (such as a galaxy cluster or black hole) can warp space-time, bending everything in it — including the paths followed by light rays from a bright background source. This alters the time taken for the light to reach an observer, and can both magnify and distort the apparent image of the background source.

"Unlike an optical lens, maximum 'bending' occurs closest to, and minimum 'bending' furthest from, the center of a gravitational lens. Consequently, a gravitational lens has no single focal point, but a focal line instead. If the source, massive lensing object, and observer lie in a straight line, the source will appear as a ring behind the massive object. This phenomenon was first mentioned in 1924 by the St. Petersburg physicist Orest Chwolson and quantified by Albert Einstein in 1936."

— from Wikipedia

Related Links
Lens a picture from the Web! -- great fun
NASA Goddard Spaceflight Center
Max-Planck-Gesellschaft, courtesy of Living Reviews
Dept. of Astronomy, Berkeley
CalTech


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