西内SINE

有时我会带奥拉到另一个发射场去看看，因为我们离得太近了:世界各地都有很多国家的太空项目发射场地。最接近美国的发射平台是欧洲“阿丽亚娜”太空计划一号项目，圭亚那航天中心。它位于法属圭亚那蔻柔  (歌词)。这里有一个数学测试，适合所有参加这次旅行的孩子们:
Sometime I will take Aura to another launch site just to see it, because we are so close: There are launch sites for various nations’ space programs all around the world. The closest non-U.S. launch pad is the European “Ariane”space program one at the Guiana Space Centre. That's in Koarou, French Guiana  (lyrics). Here is a math test for any kids on this trip:

罗杰·莱斯米尔，《太空领地》(旧金山:柯林斯出版公司，1990年)，第152页:
Roger Ressmeyer, Space Places (San Francisco: Collins Publications Inc., l990), p. l52:

"这里的发射通常安排在晚上，因为多变的热带气候可能最有利于发射。
"Launches here are normally scheduled for the evening, when the volatile tropical climate is most likely to be favorable for liftoff.

"当地的地理情况和物理定律使法属圭亚那成为理想的发射地点。向东的地球同步轨道和南北向的极地轨道都只需要一个发射台。东部和北部数千公里的开阔海域确保了火箭坠落不会掉落到人口稠密的地区。为了达到同样的极地和赤道能力，美国在佛罗里达和加利福尼亚也需要发射台。
"Both local geography and the laws of physics make French Guiana an ideal launch site. Only one pad is necessary for both easterly geosynchronous trajectories and north-south polar orbits. Thousands of kilometers of open ocean to the east and north ensure that falling rocket stages won’t land in populated areas. In order to achieve the same polar and equatorial capabilities, the U.S. requires launch pads in both Florida and California.

法属圭亚那的地理位置由于靠近赤道而具有额外的优势，在赤道区域，地球表面的旋转速度为向东飞行的火箭提供了将近每小时1700公里的额外推力。额外的助推意味着一枚火箭从法属圭亚那发射的有效负载比从卡纳维拉尔角发射多10%。为了实现同样的效果，美国正计划在离赤道最近的夏威夷州建立一个新的发射场地，夏威夷州是唯一一个向两极和赤道轨道提供畅通轨道的州。
The French Guiana site derives an added advantage from its proximity to the equator, where the rotational velocity of the earth’s surface imparts an extra push of almost 1,700 kilometers per hour to rockets headed eastward. The added boost means a given rocket can launch 10% more payload from French Guiana than from Cape Canaveral. To achieve those same benefits, the U.S. is planning a new launch facility in Hawaii, the state closest to the equator, and the only one that offers unobstructed trajectories toward both polar and equatorial orbits.

学校难题（数学问题）
School daze (math problem)

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