![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/William_herschel_Telescope_Dome.jpg/640px-William_herschel_Telescope_Dome.jpg&w=640&q=50)
PlanetPol
From Wikipedia, the free encyclopedia
PlanetPol was a ground-based, high sensitivity polarimeter based at the William Herschel Telescope[1] on the island of La Palma in the Canary Islands, Spain that has now been decommissioned. It was the most sensitive astronomical visual polarimeter ever built in fractional polarisation, a mantle that since its decommissioning now belongs to HIPPI. Although the device could be used for a wide range of astronomy, its primary use was the detection of extrasolar planets.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/William_herschel_Telescope_Dome.jpg/640px-William_herschel_Telescope_Dome.jpg)