I am. outraged at the university's treatment of a retired professor.. Mark of Excellence The matter of the practical benefits of emeritus status, however, is amoot point at many institutions, especially community colleges, thatlack resources to share with retired faculty members.
Dear publish1000-ga; You posed a great question. The answer is really much simpler than it first appears. The US Space Shuttle uses a rocket propulsion system to get into its final orbit in its approach to Earth. Other than that the Shuttle is essentially falling and during re-entry the aircraft is actually a glider. The reentry speed is largely dictated by the Earth gravitational pull and given the physics of such a reentry the speed is typically approximately 25,405 feet per second (17,322 statute miles per hour).
The shuttle travels at about 17,500 - 18,000 miles per hour when in orbit, pretty fast but nowhere near approaching light speed. There are various theories about how we could bump up the volume so to speak. There's the famous solar-sail theory.o it takes an infinite amount of energy to reach the speed of light. This has been proven by Cyclotrons which are magnetic pipes with a radius of 1 mile. They put electrons in them and spin them faster and faster until they reach 0.9999 of speed of light.