2025年4月6日
Moonquakes Surprisingly Common
Image Credit: NASA, Apollo 11 Crew
Explanation: Why are there so many moonquakes? Analyses of seismometers left on the moon during the Apollo moon landings reveal a surprising number of moonquakes occurring within 100 kilometers of the surface. In fact, 62 moonquakes were detected in data recorded between 1972 and 1977. Many of these moonquakes are not only strong enough to move furniture in a lunar apartment, but the stiff rock of the moon continues to vibrate for many minutes, significantly longer than the softer rock earthquakes on Earth. The cause of the moonquakes remains unknown, but a leading hypothesis includes tidal gravity from — and relative heating by — our Earth. Regardless of the source, future moon dwellings need to be built to withstand the frequent shakings. Pictured here, Apollo 11 astronaut Buzz Aldrin stands beside a recently deployed lunar seismometer, looking back toward the lunar landing module.
Explore Your Universe: Random APOD Generator
Tomorrow’s picture: yes, flocculent
月震意外频繁
影像提供: NASA, Apollo 11 Crew
说明: 为何月震会如此之多？分析阿波罗登月任务留在月表的地震仪之数据后，意外发现月球表层一百公里内有数量颇多的月震。因为，1972年到1977年间的数据，总共记录了62例月震。许多这些月震不但强烈到能移动 月球公寓的家具，并让月球的硬岩持续震动了数分钟，远长于地球软岩地震的持续时间。这些月震的成因不明，而最可信的起源假说认为，造成月震的诸多原因之中，包括地球的潮汐力及相对加热。不论月震的源头为何，未来的月球建物要能承受经常发生的月震。在上面这张影像里，阿波罗11号的宇航员艾德林站在刚架好的月震仪旁边，面朝登月舱。
探索你的宇宙: 随机APOD生成器
明日的图片: yes, flocculent
