And why is it a very critical time when r astronaut vehicle crosses through the orbitt?? Is it more dangerous crossing outwards or inwards towards the earth?
2006-10-28 06:06:43 · 6 answers · asked by Mark 1 in Science & Mathematics ➔ Earth Sciences & Geology
At initial re-entry the vehicle is traveling at its greatest velocity encountering resistance from molecules in the atmosphere and the greatest deceleration of the trip from frictional forces. The rate of decent doesn't change much after that, so the transfer of energy is more consistent, less violent, and heat doesn't get to build up.
Part two; at a steeper entry angle, the vehicle encounters greater atmosphere faster so will get hotter. A shallow angle however is a narrower entry target so if the ship doesnt decelerate enough, it will miss the re-entry. Since there is no fuel for a second try to slow down, and not enough life support for a long wait, I would say the shallow entry is more dangerous.
2006-10-28 18:03:58 · answer #1 · answered by merlyn 2 · 0⤊ 0⤋
Re-entry is by far the most critical time for any manned space vehicle because the electromagnetic interfearence generated by the hot plasma shroud of re-entry cuts off radio communications.
2006-10-28 13:18:12 · answer #2 · answered by S.A.M. Gunner 7212 6 · 0⤊ 0⤋
Think space shuttle Columbia. It broke apart during re-entry killing everybody on board.
2006-10-28 13:28:17 · answer #3 · answered by Mech_Eng 3 · 0⤊ 0⤋
Friction with the atmoshere generates heat.
2006-10-28 13:15:13 · answer #4 · answered by luckyaz128 6 · 0⤊ 0⤋
All that kinetic energy has to go somewhere. It's mostly turned into heat. The same as you turn your car's kinetic energy into heat with your brakes.
2006-10-29 13:51:32 · answer #5 · answered by Nomadd 7 · 0⤊ 0⤋
because of the speed?
2006-10-28 13:40:58 · answer #6 · answered by Anonymous · 0⤊ 0⤋