永利国际唯一指定官网:Climate change is leaving us with extra space junk

 作者:赏措     |      日期:2019-03-14 05:15:12
RISING sea levels, vanishing glaciers and earlier blooming of flowers are among the well-documented effects of climate change. An increase in space junk can now be added to that list. The upper layers of the atmosphere have a braking effect on defunct satellites and spent rockets, eventually causing them to drop out of orbit and burn up. Arrun Saunders and Hugh Lewis, at the University of Southampton in the UK, studied the orbits of 30 satellites over the past 40 years,