(in radio location of planets)
41Occultation — See also: Occult (disambiguation) In this July 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. An occultation is an event that occurs… …
42Asteroids in fiction — Asteroids and asteroid belts are a staple of science fiction stories.Asteroids play several potential roles in science fiction: as places which human beings might colonize; as resources for extracting minerals; as a hazard encountered by… …
43Longitude — For Dava Sobel s book about John Harrison, see Longitude (book). For the adaptation of Sobel s book, see Longitude (TV series). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are… …
44Moon — This article is about Earth s Moon. For moons in general, see Natural satellite. For other uses, see Moon (disambiguation) …
45Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …
46Voyager 1 — This article is about the spacecraft. For the album by The Verve, see Voyager 1 (album). For fictional Voyager One from Space: 1999, see Voyager One (Space: 1999). Voyager 1 Voyager …
47Arecibo Observatory — Arecibo Radio Telescope Organization SRI International, NSF, Cornell University Location …
48Communication with extraterrestrial intelligence — (CETI) is a branch of the search for extraterrestrial intelligence that focuses on composing and deciphering messages that could theoretically be understood by another technological civilization. The best known CETI experiment was the 1974… …
49Mars in fiction — Fictional representations of Mars have been popular for over a century. Interest in Mars has been stimulated by the planet s dramatic red color, by early scientific speculations that its surface conditions might be capable of supporting life, and …
50Observations and explorations of Venus — Venus in real color as it would appear to the naked eye. Observations of the planet Venus were first recorded by Babylonian astronomers around 1600 BC and have continued into the present.[dubious – …
