Galileo Galilei the use of the compasses for 120 lire. In about 1593, Galileo constructed a thermometer, using the expansion and contraction of air in a bulb to move water in an attached tube. In 1609, Galileo was, along with Englishman Thomas Harriot and others, among the first to use a refracting telescope as an instrument to observe stars, planets or moons. The name "telescope" was coined for Galileo's instrument by a Greek mathematician, Giovanni Demisiani, at a banquet held in 1611 by Prince Federico Cesi to make Galileo a member of his Accademia dei Lincei. The name was derived from the
Theodore Janssen Theodore Janssen Sir Theodore Janssen of Wimbledon, 1st Baronet (c. 1658 – Wimbledon, London, 22 September 1748) was a French-born English financier and Member of Parliament who after a long and successful career in commerce was ruined and disgraced by his part in the South Sea Bubble. Janssen was born in Angoulême, France, son of the paper maker Abraham Janssen and Henriette Manigault. His grandfather, Theodore Janssen de Heez, had taken refuge in France from the Duke of Alba's persecution in the Netherlands. Janssen moved to England in 1680, making his home at Wimbledon, where he bought Wimbledon manor. He