rjxie 发表于 2003-8-1 13:03

[酷图] 城市上空的月亮和明亮的火星。

Moons and Bright Mars
Credit & Copyright: Petteri Kankaro
Explanation: In this serene view, the moons of Earth along with the bright planet Mars shine above the city of Turku near the southwestern tip of Finland. Of course Earth's large natural satellite, the Moon, at a distance of 400,000 kilometers, is by far the brightest object in this sky. But growing brighter and closer by the hour, Mars appears as the impressively bright "star" at the right, about 64 million kilometers from Turku. Streaking across the twilight sky between the two celestial beacons, Earth's largest artificial moon, the International Space Station, orbits about 400 kilometers above the planet's surface. To capture the moment, amateur astronomer Petteri Kankaro used a digital camera and combined exposures beginning at 23:34 Universal Time on July 17th.

愚公 发表于 2003-8-1 14:43

相片中的斜线是什么？

rjxie 发表于 2003-8-1 14:47

国际空间站的轨迹。

RT

浩然星空 发表于 2003-8-1 20:34

这么长的ISS轨迹，拍摄时间应该在1分钟以上吧，怎么没看到月亮和火星拉长？是数码多次暴光合成的吧

rjxie 发表于 2003-8-1 20:35

看看这句：

amateur astronomer Petteri Kankaro used a digital camera and combined exposures beginning at 23:34 Universal Time on July 17th.

zhangkj7068 发表于 2003-8-1 23:54

用了自动跟踪装置。

流星的诱惑 发表于 2003-8-3 12:26

如果用了跟踪装置的话那左边的高楼不应该这么清晰呀，难道是合成的？

dj-doohan 发表于 2003-8-3 13:58

可以用两张照片合成

周熠君 发表于 2003-8-5 08:58

单次暴光能拍到城市，就难拍到火星了。现在连照片都可以伪造了，何况数码？！
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