https://padlet.com/aatkin5021/1q0vf4cjjvn8 Telescope, Astrolabe, compass, sextants en-us 2019-11-07 14:44:16 UTC 2019-11-14 14:36:17 UTC hello@padlet.com aatkin5021 https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/408096027 The first telescopes were used by sea merchants and the military.]]> 2019-11-07 14:48:37 UTC https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/408096027 aatkin5021 https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/411197590 The astrolabe is a tool using the positions of the stars or sun. It was formerly used in navigation to help explorers and sailors figure out where they were.]]> 2019-11-14 14:23:31 UTC https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/411197590 aatkin5021 https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/411199993 Compasses were first invented by the Chinese in the 1100's and were used for navigation for ships and deciding where to build cities.]]> 2019-11-14 14:26:35 UTC https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/411199993 aatkin5021 https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/411203421 A sextant is an object used for navigation which measures angles. The user is able to measure the angle between the horizon and an object in the sky, such as the sun, a star, or a planet. It originally could measure angles up to 60°, which was one sixth of a circle.]]> 2019-11-14 14:30:49 UTC https://padlet.com/aatkin5021/1q0vf4cjjvn8/wish/411203421