2025年2月22日
Rima Hyginus
Image Credit & Copyright: Vincenzo Mirabella
Explanation: Rima Hyginus is a spectacular fissure, some 220 kilometers long, found near the center of the lunar near side. Easy to spot in telescopic views of the Moon, it stretches top left to bottom right across this lunar closeup. The image was made with exaggerated colors that reflect the mineral composition of the lunar soil. Hyginus crater lies near the center of the narrow lunar surface groove. About 10 kilometers in diameter, the low-walled crater is a volcanic caldera, one of the larger non-impact craters on the lunar surface. Dotted with small pits formed by surface collapse, Hyginus rima itself was likely created by stresses due to internal magma upwelling and collapse along a long surface fault. The intriguing region was a candidate landing site for the canceled Apollo 19 mission.
Tomorrow’s picture: northern Saturn
希吉努斯溪
影像提供与版权: Vincenzo Mirabella
说明: 希吉努斯溪（Rima Hyginus）是月球正面中心附近的壮观裂缝，全长将220公里。在这张月球的特写影像里，用望远镜轻易可见的这道裂缝，从左上方延伸至右下方。这张影像的色彩经过夸大，以突显月球土壤的矿物成分。在这道狭长月表裂缝的中点附近，有个直径约10公里的希吉努斯坑（Hyginus Crater），其低矮的坑墙显示它为火山口，是月表的较大型非撞击坑之一。希吉努斯溪的表面散布着许多月表塌陷所形成的小坑，而希吉努斯溪的成因，推测可能与月球内部岩浆涌升及月表断层塌陷有关。这个很有趣的区域，是取消的阿波罗19号登月任务的候选降落点之一。
明日的图片: northern Saturn
