The surface of the moon is covered with regolith . as there is no weathering and erosion , the footprints left by astronauts would remain for million of years 月球表面铺满粉状的微尘，由于没有风化影响，太空人在月面留下的足迹相信可保存数百万年。
3.
The surface of the moon is covered with regolith . as there is no weathering and erosion , the footprints left by astronauts would remain for million of years 月球表面铺满粉状的微尘，由于没有风化影响，太空人在月面留下的足迹相信可保存数百万年。
4.
Finally , nasa and the florida space research institute are sponsoring moonrox , the moon regolith oxygen competition . a 250 , 000 prize goes to the team that can extract 5 kg of breathable oxygen from jsc - 1 lunar stimulant , a new lunar soil simulant developed under the auspices of nasa johnson space centre , in 8 hours 最后，美国太空总署和佛罗里达太空研究中心，正赞助一项名为月球表土氧气的赛事，提供25万美元奖金给率先在八小时内能从美国太空总署庄臣太空中心的模拟月球土壤jsc - 1提取5公斤可呼吸氧气的人。
