Search results
Results From The WOW.Com Content Network
Declassified: Untold Stories of American Spies is a documentary series that details important cases, missions and operations of the American intelligence community, told firsthand by the men and women who worked them.
Passage de Vénus is a series of photographs of the transit of the planet Venus across the Sun on 9 December 1874. [1] They were purportedly taken in Japan by the French astronomer Jules Janssen and Brazilian engineer Francisco Antônio de Almeida using Janssen's ' photographic revolver '. [2][3][4] It is the oldest "film" listed on IMDb and ...
KH-9 HEXAGON. KH-9 (BYEMAN codename HEXAGON), commonly known as Big Bird or KeyHole-9, [1] was a series of photographic reconnaissance satellites launched by the United States between 1971 and 1986. Of twenty launch attempts by the National Reconnaissance Office (NRO), all but one were successful. [2] Photographic film aboard the KH-9 was ...
The observers were ordered to record the transit in four phases of Venus' journey across of the sun. The first phase was when Venus began "touching" the outside rim of the sun. In the second phase, Venus was completely within the sun's disc, but was still "touching" the outer rim. In the third phase, Venus has crossed the sun, was still ...
The episode also examines the planet Venus to inspect the runaway greenhouse effect. [2] The episode's title alludes to H. G. Wells ' novel published in 1914, The World Set Free , where Wells predicts that humanity will develop destructive nuclear weapons , perpetuating a devastating global war and forcing the world to come to its senses to ...
A transit of Venus takes place when Venus passes directly between the Sun and the Earth (or any other superior planet), becoming visible against (and hence obscuring a small portion of) the solar disk. During a transit, Venus is visible as a small black circle moving across the face of the Sun. Transits of Venus reoccur periodically.
Earth orbit (yellow) compared to a circle (gray) Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, [1] in a counterclockwise direction as viewed from above the Northern Hemisphere. One complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million ...
As it orbits the Sun, Venus displays phases like those of the Moon in a telescopic view. The planet appears as a small and "full" disc when it is on the opposite side of the Sun (at superior conjunction). Venus shows a larger disc and "quarter phase" at its maximum elongations from the Sun, and appears at its brightest in the night sky. The ...