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Personal flotation devices being worn on a navy transport . A personal flotation device (PFD; also referred to as a life jacket, life preserver, life belt, Mae West, life vest, life saver, cork jacket, buoyancy aid or flotation suit) is a flotation device in the form of a vest or suit that is worn by a user to prevent the wearer from drowning in a body of water.
Through the end of the 20th century, the Perkins Telescope was the observatory's largest instrument. Observing time on this instrument was shared between Lowell astronomers and the Ohio State University. The 69-inch (1.8 m) telescope at Perkins was immediately replaced with a 32-inch (810 mm) cassegrain reflector telescope. It was donated by ...
The telescope has stepper motor drive control with an electrical focusser. The dome is electrically driven and will move automatically as the telescope tracks across the sky. Various cameras can be attached to the telescope to record images and video and display what the telescope sees on a two-metre wide projector screen in the lecture theatre ...
One major determining factor is type of light, or particle being observed including devices referred to as "telescopes" that do not form an image or use optics. Some telescopes are classified by the task they perform; for example Solar telescopes are all designs that look at the Sun, Dobsonian telescopes are designed to be low cost and portable ...
Four of the sixty-four total antennas of the ALMA radio telescope, at the Atacama Large Millimeter Array (ALMA) West arm of the low-frequency Ukrainian T-shaped Radio telescope, second modification (UTR-2) radio telescope phased array antenna. This is a list of radio telescopes – over one hundred – that are or have been used for radio ...
Life jackets are available at the loaner station for anyone to use, from infants to adults. Dubics also plans to check the loaner stands weekly and replace any jackets that are worn, damaged or ...
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The Near Infrared Camera and Multi-Object Spectrometer (NICMOS) is a scientific instrument for infrared astronomy, installed on the Hubble Space Telescope (HST), operating from 1997 to 1999, and from 2002 to 2008. Images produced by NICMOS contain data from the near-infrared part of the light spectrum.