http://www.universetoday.com/128208/buried-lave-tubes/![](http://www.universetoday.com/wp-content/uploads/2016/04/Marius_hills-e1459549413919-768x528.png)
Marius Hills pit
![](http://www.universetoday.com/wp-content/uploads/2016/04/grail-768x432.jpg)
Artist concept of the GRAIL mission, twin spacecraft that fly in tandem around the Moon to measure its gravity field. Credit: NASA/JPL
![](http://www.universetoday.com/wp-content/uploads/2015/03/Lava_tubes-1024x258.jpg)
Artist’s impression of a lava tube measuring several kms wide, with the city of Philadelphia shown inside for scale: Purdue University/David Blair
科學家認為 直接蓋在洞內比較快
還能抗宇宙射線
![](http://www.universetoday.com/wp-content/uploads/2016/04/grail_gravity-1-700x432.jpg)
月面重力圖
地球上的
https://en.wikipedia.org/wiki/Lava_tube![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Valentine_Cave.JPG/280px-Valentine_Cave.JPG)