|
Atmospheric reentry is the movement of human-made or natural objects as they enter the atmosphere of a planet from outer space, in the case of Earth from an altitude above the "edge of space." This article primarily addresses the process of controlled reentry of vehicles which are intended to reach the planetary surface intact, but the topic also includes uncontrolled (or minimally controlled) cases, such as the intentionally or circumstantially occurring, destructive deorbiting of satellites and the falling back to the planet of "space junk" due to orbital decay. Vehicles that typically undergo this process include ones returning from orbit (spacecraft) and ones on exo-orbital (suborbital) trajectories (ICBM reentry vehicles, some spacecraft.) Typically this process requires special methods to protect against aerodynamic heating. Various advanced technologies have been developed to enable atmospheric reentry and flight at extreme velocities. Mars Exploration Rover (MER) aeroshell, artistic rendition. Apollo Command Module flying at a high angle of attack for lifting entry, artistic rendition. Apollo 13 Service Module and Lunar Module reentering and breaking upFrom Wikipedia under the
GNU Free Documentation License  voyager.jpl.nasa.gov 480px x 640px | 8.20kB [source page] Diagram of conception  centennialofflight.gov 444px x 400px | 84.30kB [source page] The M2 F1 lifting body is being towed behind a C 47 The wingless lifting body aircraft design was initially conceived as a way to land an aircraft horizontally after atmospheric reentry  esapub.esrin.esa.it 230px x 383px | 4.50kB [source page] Figure 1 The ARD vehicle Figure 2 The overall ARD mission Structure From Yahoo Image Search: "Atmospheric reentry"  universetoday.com Ken Kremer ue, 01 Dec 2009 10:57:08 GM Retro rockets were fired for 4 min 19 sec at 1:26 AM Tuesday morning to initiate the de-orbit braking maneuver for the fiery plunge of . atmospheric reentry. . 19 minutes later the three Soyuz segments pyrotechnically separated at an ...  zd-base.blogspot.com ZoiDieCT ArchAeA Fri, 18 Dec 2009 07:38:00 GM if i not mistaken...this pose is called '. atmospheric re-entry. ' mode...don't know if i'm right or not... one question:can Wing Zero be mounted on Action Base 1?? the answer is Yes...in the package of Action Base 1..a clip similar to ... universetoday.com Ian O'Neill hu, 28 Feb 2008 22:39:02 GM NASA's over budget Mars Science Laboratory mission, scheduled for a 2009 launch, may be delayed due to problems with the . atmospheric re-entry. shield design. A. From Google Blog Search: "Atmospheric reentry"  news.google.com WebWire (press release) European Space Agency (ESA) and Thales Alenia Space sign agreement for development of the IXV (Intermediate eXperimental Vehicle) atmospheric reentry ... news.google.com Space Ref (press release) Kazbek-UM couches are designed to withstand g-loads during launch and orbital insertion as well as during reentry and brake-rocket-assisted landing. ... and more » news.google.com Newswise (press release) Hibbitts, who designed, built and manages the APL Space Department's science optics laboratory, wants to climb to the highest reaches of Earth's atmosphere ... From Google News Search: "Atmospheric reentry" How much heat is generated in Atmospheric Reentry? Q. Just wondering. Asked by Mac - Tue Jan 26 10:56:09 2010 - - 4 Answers - 0 Comments A. You need more information. First it depends on where in the earths atmosphere you are taking a measurement. The atmosphere of the earth is heterogeneous. Also you would need to account for angle of entry, shape, size and cooling ability of the ship, etc. I am sure I am missing a lot. However if you want some more info see the link... Answered by makai d - Tue Jan 26 11:09:49 2010 I have a hypothetical question about atmospheric reentry and speed for ya? Q. Let s suppose that you have a craft with a device that can reduce the earths gravitational effect to a point of neutral balance. So that In effect you space craft can sit in a stationary orbit Geosynchronous/geostation ary at any altitude at relative low ground speeds but still have enough gravitational effect to keep it from being left behind as the earth and solo system moves throw space. Now the reason I ask this is as I understand it for a Real space craft for example the Space shuttle to return to earth it must decelerate so that gravity can pull it back in to the earth s atmosphere but because of its still relative high speed it needs heat shields to protect it form the airs friction ,blah, blah, Now I was think if this… [cont.] Asked by marcusviii_bloodfin1 - Wed Aug 22 16:50:07 2007 - - 7 Answers - 0 Comments A. You would need to have some sort of tractor beam in order to do this. You would basically tractor beam your self to the planet and then slowly free fall at the same point. You would still be in motion, the force of the earth's rotation would propel your ship at the same speed. But since you would be traveling at the same speed as the rotation it would seem like you are not moving at all. This is the concept behind the space elevator. Since the elevator would be in the same spot the only energy needed would be to lift the elevator. Answered by Jason G - Wed Aug 22 18:21:58 2007 On reentry, why doesnt a space vehicle slow down to avoid friction and burning?
Q. A space vehicle on reentry faces burning away like a meteor due to intense atmospheric friction because of which heat shields come into play. Now if it slowed down using onboard motors and leftover fuel, it could avoid atmospheric friction. Why does not this happen? Asked by prashanth_142 - Wed Dec 19 07:49:02 2007 - - 9 Answers - 0 Comments A. Well the heat generated would travel up the canals of the boosters and blow up the gas tank. if they cam in to slow they would have to be at a different reentry pitch. that would be a lower pitch and the shuttle would bounce off the atmospher. I know beacuse my son took space camp for a summer school. They brought in a space shuttle simulator. Answered by The wierd dude - Wed Dec 19 07:59:38 2007 From Yahoo Answer Search: "Atmospheric reentry" |
