The NASA Exceptional Achievement Medal is an award of the National Aeronautics and Space Administration established in 1991. The medal is awarded to both civilian members of NASA and military astronauts.. To be awarded the medal, a NASA employee must make substantial contributions characterized by a substantial and significant improvement in operations, …

Tullahoma is a city in Coffee and Franklin counties in southern Middle Tennessee, United States.The population was 20,339 at the 2020 census. In 2019, the population was estimated to be 19,555. It is the principal city of the Tullahoma micropolitan area (a 2009 estimate placed it at 99,927), which consists of Coffee, Franklin, and Moore counties and is the second largest …

Il programma Voyager è un programma scientifico statunitense che ha condotto al lancio nel 1977 di due sonde spaziali, chiamate Voyager 1 e Voyager 2, per l'esplorazione del sistema solare esterno.. Nella fase iniziale del programma entrambe le sonde hanno osservato i pianeti Giove e Saturno.La sonda Voyager 2 è stata in grado di osservare anche i pianeti Urano e Nettuno …

Trois ans plus tard, Gary Flandro également du JPL, constatant une conjonction unique de planètes qui doit se produire entre 1976 et 1978, ... Wikipedia® est une marque déposée de la Wikimedia Foundation, Inc., organisation de bienfaisance régie par le paragraphe 501(c)(3) ...

Sep 16, 2016 · 美国航天工程师Gary Flandro发现. 木星、土星、天王星、海王星等四颗外行星. 将在70年代末出现在太阳的同一侧并呈几何排列. 这意味着. 人类只需一次航行即可同时造访它们. 它们巨大的引力还可以让航天器获得加速度. 原本30年的路程如今12年就可走完