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Type of site
Service provider
OwnerMichael Paolucci (Founder)
Alexa rankPositive decrease 46,102 (April 2014)[1]
LaunchedJune 26, 2003[2]
Current statusActive

Slooh is a robotic telescope service that can be viewed live through a web browser with Flash plug-in. It was not the first robotic telescope, but it was the first that offered "live" viewing through a telescope via the web.[3] Other online telescopes traditionally email a picture to the recipient; the site has a patent on their live image processing method.[4] Slooh is an online astronomy platform with live-views and telescope rental for a fee.[5] Observations come from a global network of telescopes located in places including Spain and Chile.[5]

The name Slooh comes from the word "slew" to indicate the movement of a telescope, modified with "ooh" to express pleasure and surprise.


The service was founded in 2002 by Michael Paolucci; as of October 2009, Paolucci remains as chairman.[6] The service went online December 25, 2003 but was not available to the public until 2004.

Participating observatories[edit]

The original astronomical observatory is located on the island Tenerife in the Canary Islands on the volcano called Teide; the site is at the 2,300-metre (7,500 ft) elevation[7] and situated away from city light pollution. This (Canary Islands) site includes 2 domes, each with 2 telescopes; each dome has a high-magnification telescope and a wide-field telescope. One dome is optimized for planetary views (e.g., more magnification and a different CCD), and the other is optimized for deep sky objects (e.g., less magnification, more light sensitive CCD). Each dome offers 2 telescopic views: one high magnification (narrow field) view through a 14-inch (360 mm) Celestron Schmidt-Cassegrain telescope; and a wide view through either a telephoto lens or an APO refractor. In 2012, the Canary Islands Observatory was assigned observatory code G40.[8]

On February 14, 2009, Slooh launched a second observatory in the hills above La Dehesa, Chile; this site offers views from the Southern Hemisphere. In 2014, the Chile Observatory was assigned observatory code W88.[9]

Unlike Google Sky which features images from the Hubble Space Telescope, Slooh can take new images of the sky with its telescopes.[5]

See also[edit]


  1. ^ " Site Info". Alexa Internet. Retrieved 2014-04-01.
  2. ^ " - Traffic Details from Alexa". Retrieved October 9, 2009.
  3. ^ New York NY (SPX) (9 March 2005). " Promotes Slooh Online Telescope To Readers". Retrieved 19 January 2017.
  4. ^ US patent 7194146 
  5. ^ a b c Cassie Rodenberg, "The Best in Armchair Astronomy", Popular Mechanics (March 22, 2010) - Accessed October 2010
  6. ^ "SLOOH - About Us". Retrieved October 9, 2009.
  7. ^ "SLOOH - System Specifications". Retrieved September 26, 2012.
  8. ^ "MPC 80331- 81072" (PDF). The Minor Planet Center. Retrieved 2017-12-22.
  9. ^ "MPC 89089- 89388" (PDF). The Minor Planet Center. Retrieved 2017-12-22.

External links[edit]