i heard about a discovery that said that each sky has a door in which the rocket must pass through it not to be cruched and when you pass this doors i.e: after 150-200 kilometers you can not see anything as there is a complete darkness so is this true ?
2006-08-20 10:10:37 · 10 answers · asked by reem 1 in Science & Mathematics ➔ Astronomy & Space
I'll go on a limb and assume that you meant "window".
If you really meant door, someone was taking you for a fool.
And irrespective of what you were told, there is no such thing as crunching a rocket at 150 km altitude. And I'd be curious to know where you heard that crazy stuff.
Launch window is a period of time from where a rocket can be launched and be able to reach a given orbit with a set position. Suppose one wants to launch a rocket that needs to reach the international space station. Well, you just can't launch any time, the station has to be at the right place for the rocket to reach it. Miss the opportinity now, and you may have to wait hours or even days before the orbit of the station comes around to be properly positioned again.
Launch window for interplanetary probes are even more strict, as most of them use the "slingshoot" effet (garvity assist) to gain speed and to change direction. Miss the launch window, and the oppoetunity could be gone for years.
In 1977, a rarely seen occurence of positioning of the outer planet allowed a space proble to slingshot from one planet to the next, allowing Voyager 2 to fly-by Jupiter, Saturn, Uranus and Neptune. If the probes would not have been launched in 1977, well, the next time all the planet would be properly aligned again is supposed to take place in 2146. 1977 was a launch window NASA could not afford to miss...
2006-08-20 10:32:33 · answer #1 · answered by Vincent G 7 · 2⤊ 0⤋
Dear Reem, what you are describing might be the what so called "Escape Velocity". The escape velocity is a threshold velocity if you reach it you can escape from the earth gravitional pull and float into space. If the space ship cannot reach the escape velocity it won't be able to travel out of earth. Each "Sky" has its own escape velocity that is that each planet has a different escape velocity depending on its mass and some other factors. I believe you have read these info somewhere in a religion site where usually namings like "door to the sky" is often used.
2006-08-23 01:01:29 · answer #2 · answered by mustang_lost 1 · 0⤊ 0⤋
In a sense you are correct. There is a certain angle at which you should to enter the atmosphere. Too small of an angle causes intense heat, too large of an angle can cause you to bounce off the atmosphere.
But you cannot see it. And what do mean by "each sky"? How many are there?
2006-08-20 10:37:28 · answer #3 · answered by iandanielx 3 · 0⤊ 0⤋
No, this is fiction. There are "doorways" that is certain specific times that you use launch rockets in order for them to get to certain planets, moons, etc. but there are no physical doorwaus.
2006-08-20 10:46:43 · answer #4 · answered by kemchan2 4 · 0⤊ 0⤋
Where did you hear or read that? It is utter nonsense there are no doors in the sky.
2006-08-20 12:15:11 · answer #5 · answered by Pyramider 3 · 0⤊ 0⤋
Sometimes I wonder if Yahoo actually employees people to invent and post questions like this.
Or maybe I'm just getting paranoid in my old age? ☺
Doug
2006-08-20 10:38:39 · answer #6 · answered by doug_donaghue 7 · 1⤊ 0⤋
No there are no doors in the sky.
2006-08-20 10:30:51 · answer #7 · answered by dinizle26 2 · 0⤊ 0⤋
There are three. One leads to heaven, one to hell, and one to a white-elephant prize. (Watch Let's Make a Deal for details.)
Just kidding, of course; there are no doors.
2006-08-20 10:27:51 · answer #8 · answered by Anonymous · 0⤊ 3⤋
oh yes!, like the one in my as*
2006-08-20 13:56:07 · answer #9 · answered by Man 5 · 0⤊ 0⤋
NO
2006-08-20 11:00:28 · answer #10 · answered by sherry r 2 · 0⤊ 0⤋