案例简介：@ babaktafreshi/史前岩画的照片出现在月光下，这是大约10,000年前在伊朗中部Teimareh山谷的狩猎场景。在该地区发现了成千上万的岩画，它是世界上最丰富的岩石艺术遗址之一，至今仍未开发。北极星北极星和小熊座的其余部分小熊出现在天空中。北极星是顶部明亮的，是北斗七星的手柄。滑动以查看星座。值得注意的是，当制作这种岩石艺术时，北极星根本不是北极星，而且离北天极也不远，北天极在明亮的维加 (Vega) 附近的天空几乎45度。这是由于地球的进动，其自转轴的缓慢摆动像旋转的陀螺。但这是一个非常缓慢的变化，周期为26,000年。对于旋转的陀螺，当它减速时会发生这种情况。对于地球来说，这是由于月球和太阳的引力引起的潮汐力。有关融合艺术和科学的更多视觉故事，请参见 @ babaktafreshi。# twanight # rockart # 史前 # 北极星 # 伊朗

案例简介：Photos by @babaktafreshi / A prehistoric petroglyph appears in moonlight, a hunting scene from about 10,000 years ago in the Teimareh valley of central Iran. With thousands of petroglyphs found in the area it is one of the world’s richest rock art sites, still largely unexplored. The north star Polaris and the rest of the constellation Ursa Minor, the Little Bear, appear in the sky. Polaris is the bright one at the top, the handle of the Little Dipper. Swipe to see the constellation. It’s remarkable that when this rock art was made, Polaris was not a north star at all and nowhere near the north celestial pole, which was almost 45 degrees away across the sky near bright star Vega. This is due to the Earth’s precession, the slow wobble of its rotation axis like a spinning top. But it’s a very slow change, with a cycle of 26,000 years. For a spinning top this happens when it is slowing down. For Earth it is due to the tidal force by the gravity of the moon and sun. For more visual stories that merge art and science see @babaktafreshi. #twanight #rockart #prehistoric #polaris #iran

国家地理 - Photos by @babaktafreshi / A prehistoric petroglyph appears in moonlight, a hunting scene from about 10,000 years ago in

案例简介：@ babaktafreshi/史前岩画的照片出现在月光下，这是大约10,000年前在伊朗中部Teimareh山谷的狩猎场景。在该地区发现了成千上万的岩画，它是世界上最丰富的岩石艺术遗址之一，至今仍未开发。北极星北极星和小熊座的其余部分小熊出现在天空中。北极星是顶部明亮的，是北斗七星的手柄。滑动以查看星座。值得注意的是，当制作这种岩石艺术时，北极星根本不是北极星，而且离北天极也不远，北天极在明亮的维加 (Vega) 附近的天空几乎45度。这是由于地球的进动，其自转轴的缓慢摆动像旋转的陀螺。但这是一个非常缓慢的变化，周期为26,000年。对于旋转的陀螺，当它减速时会发生这种情况。对于地球来说，这是由于月球和太阳的引力引起的潮汐力。有关融合艺术和科学的更多视觉故事，请参见 @ babaktafreshi。# twanight # rockart # 史前 # 北极星 # 伊朗

国家地理 - Photos by @babaktafreshi / A prehistoric petroglyph appears in moonlight, a hunting scene from about 10,000 years ago in

案例简介：Photos by @babaktafreshi / A prehistoric petroglyph appears in moonlight, a hunting scene from about 10,000 years ago in the Teimareh valley of central Iran. With thousands of petroglyphs found in the area it is one of the world’s richest rock art sites, still largely unexplored. The north star Polaris and the rest of the constellation Ursa Minor, the Little Bear, appear in the sky. Polaris is the bright one at the top, the handle of the Little Dipper. Swipe to see the constellation. It’s remarkable that when this rock art was made, Polaris was not a north star at all and nowhere near the north celestial pole, which was almost 45 degrees away across the sky near bright star Vega. This is due to the Earth’s precession, the slow wobble of its rotation axis like a spinning top. But it’s a very slow change, with a cycle of 26,000 years. For a spinning top this happens when it is slowing down. For Earth it is due to the tidal force by the gravity of the moon and sun. For more visual stories that merge art and science see @babaktafreshi. #twanight #rockart #prehistoric #polaris #iran

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国家地理 - Photos by @babaktafreshi / A prehistoric petroglyph appears in moonlight, a hunting scene from about 10,000 years ago in

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