liquid mirror telescope

Most reflecting telescopes use glass mirrors to focus light from faraway objects, such as stars and galaxies. In a liquid mirror telescope, this mirror is a pool of shiny liquid instead of glass. Someday scientists hope to build a huge liquid mirror telescope at the Moon's South Pole. Since there's no atmosphere to blur the view, astronomers can see clearer and farther away than from Earth.

Image credits: main image, courtesy of P. Hickson/University of British Columbia.