- University orbiter set to lift Space Elevator technology - Weighing just 2.66 kilograms, the tiny orbiter is made of two 10-centimeter cubes connected with a tether measuring 100 meters long. The tether has a diameter of only 0.4 millimeters, but is made of Kevlar. http://www.asahi.com/ajw/articles/aj201607060005.html 3 comments worldnews