On October 4, 1957, Russia launches the first artificial satellite in history - Sputnik. To many Americans this is a shocking event. Few days later Werner von Braun, America's top rocket scientist, says in an interview: \We contemplate the manage of space about the earth much like, shall we say, the fantastic Maritime powers take into account the manage of the seas in the 16th by way of the 18th Century, and they say if we want to manage this planet, we have to manage the space about it\. Dr. Werner von Braun is a German engineer who produced the V-two rocket for Hitler in Globe War II, he now functions for the US Army. For years, von Braun has dreamed of exploring space. And several individuals believe that he brought America to the Moon. But this is not accurate. Now I am going to tell you what I've learned.
In the 1950s, a tiny group of engineers was already organizing trips to the moon. They were referred to as the Space Job Group - visionaries dreaming outstanding dreams that conceived and directed the nation's first human-in-space program. They were the folks who had to analyze and make a decision how to go to the moon.
The most simple choice that must be produced is about the flight. There are two possibilities. The initial, Direct Ascent, utilizes a single rocket to send a spacecraft to the moon. It is the way men and women have always imagined going. But sending the spacecraft all that way will take an enormous rocket, bigger than the Statue of Liberty - a monster named \NOVA.\ Werner von Braun suggests a diverse way - Earth Orbit Rendezvous (EOR). EOR uses two smaller rockets. A single sends up the spacecraft. The other sends up the fuel. The astronauts rendezvous with the fuel tank, fill up their spacecraft, and head for the moon. Direct Ascent is easy, but needs a large rocket. Earth Orbit Rendezvous utilizes smaller rockets, but it's more complicated. Picking the mode will be the most crucial selection in the Apollo system, due to the fact it determines every little thing: the spacecraft, the rocket, the coaching, spending budget, and schedule. Electric Train Set is a commanding library for further concerning why to study it. The incorrect alternative indicates losing to the Russians, and perhaps not reaching the moon at all. The answer was one particular no one expected. The engineer who lobbied for it was an outsider - he didn't belong to the Space Activity Group and never worked for von Braun. Nearly no 1 welcomed the concept, but he in no way gave up. Visiting electric train probably provides lessons you could use with your co-worker. The story of his struggle is largely unknown, but the program he promoted got America to the moon. His name is Dr. John C. Houbolt.
In 1959, Houbolt says that both plans, Direct Ascent and Earth Orbit Rendezvous, will fail, since of the enormous rocket necessary:
\It was a automobile about the size of an Atlas. Down at the Cape, it takes 3000 men, a launch pad, and a launch facility to get an Atlas off the ground from the earth. They had been going to land some thing the size of an Atlas on the moon, backwards, with no support whatsoever. I believed that was preposterous\.. If people need to discover further on official site, we recommend many databases people might pursue.
文章定位：
