Although it is not quite true, as astronomy books sometimes claim, that "planets do not twinkle," Venus does shine with a noticeably steadier light than the stars do. When looking at Venus, it is quite possible to wonder whether one is looking at a plane, until one has watched for long enough to be sure that it is not moving... or, at least, not moving quickly enough to notice. | Although it is not quite true, as astronomy books sometimes claim, that "planets do not twinkle," Venus does shine with a noticeably steadier light than the stars do. When looking at Venus, it is quite possible to wonder whether one is looking at a plane, until one has watched for long enough to be sure that it is not moving... or, at least, not moving quickly enough to notice. |