A Lensed Castle

The Castle on the Mall in Washington, D.C., as viewed from the Natural History museum.

Photo credit: Smithsonian Photo by Eric Long.


Now we place a black hole with the mass of Saturn over the middle of the Mall, and view the Castle through the resulting gravitational lens.

Click on the image for a higher resolution version.

Note that there are two images of each of the middle towers, one inside the ring and one outside.
The inner image is turned inside-out.

These images form the logo for the CfA-Arizona Space Telescope Lens Survey, CASTLeS .
Click here to see a  press release  describing CASTLeS and these images.