月球远地端全
(原标题: Lunar Farside)
2025-06-28
浏览次数: 38
潮汐锁定在同步旋转中，月球总是向地球居民展示它熟悉的近侧。不过，从月球轨道上看，月球的背面可以变得很熟悉。事实上，这张清晰的图片是由月球勘测轨道飞行器的广角相机拼接而成的，它以月球背面为中心。作为2009年11月至2011年2月期间拍摄的15000多张全球马赛克图像的一部分，最高分辨率的版本显示了每像素100米的特征。令人惊讶的是，背面粗糙的表面与覆盖着光滑的暗月壤的背面看起来非常不同。一种可能的解释是，背面的地壳更厚，这使得内部的熔融物质更难以流向表面，形成黑暗、光滑的地幔。
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Tidally locked in synchronous rotation, the Moon always presents its familiar nearside to denizens of planet Earth. From lunar orbit, the Moon's farside can become familiar, though. In fact this sharp picture, a mosaic from the Lunar Reconnaissance Orbiter's wide angle camera, is centered on the lunar farside. Part of a global mosaic of over 15,000 images acquired between November 2009 and February 2011, the highest resolution version shows features at a scale of 100 meters per pixel. Surprisingly, the rough and battered surface of the farside looks very different from the nearside covered with smooth dark lunar maria. A likely explanation is that the farside crust is thicker, making it harder for molten material from the interior to flow to the surface and form dark, smooth maria.