[:ja]NASAが公開したペール・ブルー・ドットの30周年記念リマスターした画像です。元画像では、緑、青、紫の光学フィルターにより撮影した画像を合成しましたが、今回の写真では、これをRGB（赤、緑、青）にマッピングし直しました。1ピクセルにも満たない地球がわずかに青く光っているのが確認できます。
ペール・ブルー・ドット（the Pale Blue Dot）は、1990年2月14日に約60億kmの彼方から、64,000km/hの速度で進んでいたボイジャー1号によって撮影された地球の写真です。太陽系家族写真の1枚として撮影されたこの写真では、広大な宇宙に対して地球は0.12ピクセルの小さな点でしかありません。ボイジャー1号は当初の目的を達成して太陽系を離れるところでしたが、故カール・セーガン博士の依頼を受けたNASAの指令によってカメラを地球に向け、この写真を撮影しました。撮影された地球が淡く青い点（a pale blue dot）であったことからこの写真自体が名付けられました。
参考文献： ‘Pale Blue Dot’ Revisited
地球俯瞰画像を見る： LiVEARTH
[Earthview Wonders] No.964: ‘Pale Blue Dot’ Revisited
For the 30th anniversary of one of the most iconic views from the Voyager mission, NASA has reprocessed and published a new version of the image known as the “Pale Blue Dot.” It still shows Earth as that single, bright blue pixel in the vastness of space. And that pixel is still caught within a ray of sunlight.
This excerpt from Sagan’s book Pale Blue Dot was inspired by an image taken, at Sagan’s suggestion, by Voyager 1 on Feb.14, 1990. As the spacecraft left our planetary neighborhood for the fringes of the solar system, engineers turned it around for one last look at its home planet. Voyager 1 was about 6.4 billion km away, when it captured this portrait of our world. Caught in the center of scattered light rays, Earth appears as a tiny point of light, a crescent only 0.12 pixel in size.
Reference: ‘Pale Blue Dot’ Revisited
See earthview photo gallery: LiVEARTH[:en][Earthview Wonders] No.964: ‘Pale Blue Dot’ Revisited
For the 30th anniversary of one of the most iconic views from the Voyager mission, NASA has reprocessed and published a new version of the image known as the “Pale Blue Dot.” It still shows Earth as that single, bright blue pixel in the vastness of space. And that pixel is still caught within a ray of sunlight.
This excerpt from Sagan’s book Pale Blue Dot was inspired by an image taken, at Sagan’s suggestion, by Voyager 1 on Feb.14, 1990. As the spacecraft left our planetary neighborhood for the fringes of the solar system, engineers turned it around for one last look at its home planet. Voyager 1 was about 6.4 billion km away, when it captured this portrait of our world. Caught in the center of scattered light rays, Earth appears as a tiny point of light, a crescent only 0.12 pixel in size.
Reference: ‘Pale Blue Dot’ Revisited
See earthview photo gallery: LiVEARTH[:]