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The Day the Earth Smiled refers to the date July 19, 2013, on which the Cassini spacecraft turned to image Saturn, its entire ring system, and the Earth during an eclipse of the Sun, as it had done once before during its previous nine years in orbit. The name also refers to all the activities associated with that event. Conceived by the Cassini imaging team leader and planetary scientist Carolyn Porco, the concept called for all the world's people to reflect on our place in the cosmos, to marvel at life on Earth, and, at the time the pictures were taken, to look up and smile in celebration. The final mosaic from July 19, processed at the Cassini Imaging Central Laboratory for Operations (CICLOPS), was released to the public on November 12, 2013. The photo includes planet Earth; Mars; Venus; and a host of Saturnian moons.〔 A higher-resolution view taken with the Cassini narrow-angle camera of the Earth and the Moon as distinct points of light was released shortly after July 19. ==Events== The Cassini probe took images of Earth from close to a billion miles away at 21:27 UTC, July 19, 2013. A number of activities were planned in conjunction with this occasion: * The Day the Earth Smiled website was set up as a portal to activities associated with July 19.〔(【引用サイトリンク】url=http://thedaytheearthsmiled.com/info.php )〕 On it, Porco encourages the world to celebrate life on planet Earth and humanity's accomplishments in the exploration of the solar system. * Astronomers Without Borders coordinated events internationally.〔(【引用サイトリンク】url=http://www.astronomerswithoutborders.org/projects/the-day-the-earth-smiled.html )〕 * NASA spearheaded a related event called Wave at Saturn "to help acknowledge the historic interplanetary portrait as it is being taken".〔(【引用サイトリンク】title=Cassini to Take Photo of Earth from Deep Space )〕 * A "Message to the Milky Way" contest is being held by Porco's company, Diamond Sky Productions. It is a two-part contest: People can submit a digital photo taken on July 19 and/or a music composition. The winning entries will be beamed as a message to extraterrestrials, "into the Milky Way from the Arecibo Radio Telescope in Puerto Rico". This follows the example set in 1974, when the first serious communication to alien civilizations, the Arecibo message, was broadcast from Arecibo. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「The Day the Earth Smiled」の詳細全文を読む スポンサード リンク
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