大雨 发表于 2025-3-28 15:27:05

Resources for the Future,nation. As the reflected light alternates between bright and dark every few hours, the traveler realizes his target, an asteroid, is spinning. As the view of the minor planet becomes larger, the traveler’s first impressions are typical for first contact with an asteroid: The surface is scarred with

象形文字 发表于 2025-3-28 21:36:48

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主动 发表于 2025-3-29 01:13:59

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Neuralgia 发表于 2025-3-29 06:07:50

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gerontocracy 发表于 2025-3-29 10:45:12

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LEVER 发表于 2025-3-29 11:49:37

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中世纪 发表于 2025-3-29 19:21:01

Tighten the Belt,. We view the “fossil” surfaces of the planets, satellites, and sundry objects from afar, forced to interpret ages based on inference and interpretation of two-dimensional visual images. And if we are lucky enough, we interpret three-dimensional images based on the mixing of visual and nonvisual remotely sensed data.

背信 发表于 2025-3-29 22:23:50

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callous 发表于 2025-3-30 02:13:23

Cometary Cousins,n than not, coinciding with a time of great upheaval (and, realistically, when has there not been a time of upheaval). As we will see, for us on modern Earth, comets should also give us pause because they have been known to come close and even strike our planet.

轻打 发表于 2025-3-30 05:18:55

What Else is Out there?,rough, we could also add all the debris sent into orbit around the Earth from unmanned and manned space missions.) And there are more objects out beyond the farthest planet, some of them directly tied to the asteroids.
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查看完整版本: Titlebook: Asteroid; Earth Destroyer or N Patricia Barnes-Svarney Book 1996 Patricia Barnes-Svarney 1996 asteroid.earth.steroid