Either of two things. First, celestial objects or Earth satellites are constantly in motion, as is the Earth. The orbital plane of a satellite is fixed in space relative to the stars, so as the Earth revolves around the Sun that orbital plane is in different positions relative to the Earth. Complicating that is the rotation of Earth, which means each orbit of a satellite (except geosynchronous ones) crosses the Earth in a different place. So, with all those considerations, there are only a few times when a shuttle can be launched and be able to find itself in the same orbit as the ISS, for example. That's one reason for a launch window.
The same is true of space probes. There are longer windows for them because midcourse corrections can correct relatively large differences in trajectories (because the distances are large and the correction angles are very small). But, each day a smaller launch window opens and closes because of the rotation of the Earth. If the probe is not launched in a certain time on a certain day, then the probe can't be placed on the proper path to a planet (or asteroid) or a moon.
In the old Mercury and Gemini days launch windows were also in place to ensure that, in an emergency, there was enough daylight left to be able to find the spacecraft and crew where it may have aborted into the ocean.
2007-09-11 15:44:09
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answer #1
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answered by David A 5
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The "window" that NASA speaks of is two things. First, if they are attempting a launch to the International Space Station, then they have to wait until the ISS is in a position to receive Space Shuttle. The Shuttle doesn't have an unlimited fuel supply so they can't just launch at any old time and fly to ISS. The second meaning of the "window" is that there are other objects whizzing around up there and they don't want a collision with any of them. So, they wait until the objects pass and then they can go.
I hope this helps. Good luck.
2007-09-11 15:40:33
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answer #2
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answered by ngc7331 6
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It means "window" of opportunity.
It could mean that the weather is closing in and they only have an hour and ten minutes before they have to wait until the weather clears. It could mean that the station is only going to be in the best position for a rendezvous with the shuttle for an hour and 10 minutes, after which they'll have to wait for another orbit.
It's not a "window in space."
2007-09-11 15:42:40
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answer #3
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answered by gugliamo00 7
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One hour and ten minutes is the length of time in which the shuttle can be launched that will allow it to be in the right position to rendezvous with the space station in the most economical way.
2007-09-12 04:20:29
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answer #4
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answered by Billy Butthead 7
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The time available to perform a task. In terms of a launch, the launch would need to be performed at some point during that 1 hour and 10 minutes in order to be in the position required for proper orbit timing or to avoid potential bad weather conditions.
2007-09-11 15:40:02
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answer #5
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answered by Troasa 7
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A launch window is a time period when the launch can send the rocket where they want it to go. For example, if they want to rendezvous with the space station, they need to launch just as the space station goes over the launch site in it's orbit.
2007-09-11 15:38:28
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answer #6
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answered by campbelp2002 7
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A window is a minimalistic opportunity dervied from bean counters who have to ration things.
It means that we can do this with the hardware, the fuel and the natural things (such as gravity or location).
We don't have enough RESOURCES to do things at will so we do things when a ECONOMICAL opportunity presents itself.
OK
Imagine yourself on a tightly fixed income.
You don't SPLURGE at an expensive RESTARAUN four days before PAY DAY, instead you go to the McDonanald's $1 menu.
ON pay day you can splurge, but if you go too far you can't pay your credit card bill as much as you'd like
See
That's a WINDOW OF OPPORUINITY
Window of opporunity
The BUS that goes direclty to the mall leaves at 2:30 and 4:30
The BUS that takes 3 hours to go to the mall instead of 25 minutes leaves at 3:30
Now, which is your MOST economical WINDOW of opportunity!
Do you want to get on the 3:30 bus that gest you to the mall at 6:30
Or do you want to wait 1 hour and get on the 4:30 bus that gets to to the mall at 4:55
2007-09-11 16:10:25
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answer #7
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answered by Anonymous
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They are talking about a launch window which is the period of time within which a launch must be carried out in order to reach the desired orbit.
2007-09-11 15:47:46
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answer #8
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answered by Renaissance Man 5
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The pain in your lungs.. thats your brain going into overdrive, because you are making yourself freak out. It won't be permanent, but try to avoid 2nd hand smoke when you can. But don't stress so much! You are still young and healthy, so it won't affect your stamina or body at all. So go have a glass of milk and relax ok?
2016-05-17 11:27:05
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answer #9
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answered by ? 3
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well i think usually when they send a shuttle into space they use the gravity of the moon to come back to earth, they travel around it and use it like a slingshot. so im assuming it means the time they have before the moon is not in the right position anymore.
2007-09-11 15:36:10
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answer #10
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answered by Anonymous
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