sky doors

[scifes]

i heard that there are special time and place circumstances in which something can penetrate the hemisphere to outer space..is that true? is it limited to apply on firing satellites and spaceships or is it more general??

[cosmictraveler]

i heard that there are special time and place circumstances in which something can penetrate the hemisphere to outer space..is that true? is it limited to apply on firing satellites and spaceships or is it more general??

All you need do is achieve an escape velocity in order to reach "space" .

[scifes]

why are spaceships not fired from anywhere in the world anytime in the year..there are "optimal windows of opportunity" or something both in place and time...(?)

[cosmictraveler]

why are spaceships not fired from anywhere in the world anytime in the year..there are "optimal windows of opportunity" or something both in place and time...(?)

The rockets are fired near the equator to get "help" when reaching their maximum speed needed to reach escape velocity.

[scifes]

mmhmm..i see..but that's all?

[Communist Hamster]

The term "window of opportunity" usually refers to optimal weather conditions for a launch (minimal turbulence etc) and the time when the FAA or analogous organisation has cleared the launch for takeoff (administrative stuff).

[James R]

For some interplanetary spacecraft, going to Mars or Venus or Jupiter or whatever, it is best to wait until the planets are in convenient positions so as to minimise the amount of fuel needed for the trip and therefore the launch mass of the spacecraft. This is another example of a "window of opportunity" or "launch window".

We're not talking literal windows in the sky.

[Trippy]

Even with the likes of Hubble, or the ISS, because the Shuttle (or ATV, or Soyuz capsule) needs to catch up with these other spacecraft (for want of a better term) there are optimum times when if you launch, you'll catch up in hours or maybe a ocuple of days without having to expend extra fuel, and there are suboptimal times when it might take several days, or a number of weeks to catch up with the spacecraft in question.

[scifes]

mm..

thanks guys..