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.

Description: a telescope that uses a slowly spinning pool of liquid as the mirror to detect light
Largest on Earth: the Large Zenith Telescope in Canada
Possible Location: the Moon's South Pole
Cool Fact: The light that we see from stars has taken millions or billions of years to reach us. For example, if a star 100 million light years away exploded today, people on Earth wouldn't see the explosion for 100 million years!