太阳系全家福
(原标题: Solar System Family Portrait)
2024-07-13
浏览次数: 10
1990年，在距离太阳40亿英里的地方，旅行者1号宇宙飞船回顾了过去，拍摄了有史以来第一张太阳系全家福。完整的肖像是一幅60帧的马赛克画，从黄道平面上方32度的有利位置制作而成。在这张照片中，旅行者号的广角相机镜头扫过了左侧的内太阳系，与最右侧的太阳系最外层行星——冰巨星海王星相连。金星、地球、木星、土星、天王星和海王星的位置是用字母表示的，而太阳是靠近画框中心的亮点。每颗行星的插图都来自旅行者号的窄视场相机。在照片中看不到的是水星，因为离太阳太近而无法被探测到，而火星则不幸被相机光学系统中散射的阳光所掩盖。当时冥王星比海王星离太阳更近，小而暗的冥王星的位置没有被遮住。2024年，美国宇航局运行时间最长、距离最远的航天器“旅行者1号”将在150亿英里外的星际空间运行。
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In 1990, cruising four billion miles from the Sun, the Voyager 1 spacecraft looked back to make this first ever Solar System family portrait. The complete portrait is a 60 frame mosaic made from a vantage point 32 degrees above the ecliptic plane. In it, Voyager's wide-angle camera frames sweep through the inner Solar System at the left, linking up with ice giant Neptune, the Solar System's outermost planet, at the far right. Positions for Venus, Earth, Jupiter, Saturn, Uranus, and Neptune are indicated by letters, while the Sun is the bright spot near the center of the circle of frames. The inset frames for each of the planets are from Voyager's narrow-field camera. Unseen in the portrait are Mercury, too close to the Sun to be detected, and Mars, unfortunately hidden by sunlight scattered in the camera's optical system. Closer to the Sun than Neptune at the time, small, faint Pluto's position was not covered. In 2024 Voyager 1, NASA’s longest-running and most-distant spacecraft, is some 15 billion miles away, operating in interstellar space.