History of the telescope a wider field of view than a classic Cassegrain. During the period 1850–1900, reflectors suffered from problems with speculum metal mirrors, and a considerable number of "Great Refractors" were built from 60 cm to 1 metre aperture, culminating in the Yerkes Observatory refractor in 1897; however, starting from the early 1900s a series of ever-larger reflectors with glass mirrors were built, including the Mount Wilson 60-inch (1.5 metre), the 100-inch (2.5 metre) Hooker Telescope (1917) and the 200-inch (5 metre) Hale telescope (1948); essentially all major research telescopes since 1900 have been reflectors. A number of 4-metre class (160 inch)
Where in the World? (Irish game show) Where in the World? (Irish game show) Where in the World? was an Irish quiz show presented firstly by Marty Whelan and subsequently by Theresa Lowe that was broadcast for nine series between 1987 and 1996. The show featured two teams of four made up of two families, answering a series of geography-based questions. A Little Bit TV (Episode 7) focuses on Theresa Lowe the TV presenter who presented Where in the World? During the 80’s & 90’s. 6 Rounds. 2 Families. 1 Holiday. Teams are made up of 4 family members. Each opposing family member goes head to head