Mission
The three stage launch vehicle placed Vanguard into a 654 by 3,969 kilometres (406 mi × 2,466 mi), 134.2 minute elliptical orbit inclined at 34.25 degrees on March 17, 1958. Original estimates had the orbit lasting for 2,000 years, but it was discovered that solar radiation pressure and atmospheric drag during high levels of solar activity produced significant perturbations in the perigee height of the satellite, which caused a significant decrease in its expected lifetime to only about 240 years. The Vanguard 1 transmitted its signals for nearly 7 years as it orbited the earth.
Read more about this topic: Vanguard 1
Famous quotes containing the word mission:
“Every Age has its own peculiar faith.... Any attempt to translate into facts the mission of one Age with the machinery of another, can only end in an indefinite series of abortive efforts. Defeated by the utter want of proportion between the means and the end, such attempts might produce martyrs, but never lead to victory.”
—Giuseppe Mazzini (1805–1872)
“I am succeeding quite well in my work and the future looks well. What special mission is God preparing me for? Cutting off all earthly ties and isolating me as it were.”
—Ellen Henrietta Swallow Richards (1842–1911)
“Perhaps the mission of those who love mankind is to make people laugh at the truth, to make truth laugh, because the only truth lies in learning to free ourselves from insane passion for the truth.”
—Umberto Eco (b. 1932)