Deep Space Information
2015年7月14日 星期二
NASA Needs to Pick A Planet Number
@DavidWeaver how many planets are there in our solar system? Officially NASA says 8 which means this was accomplished in 1989 #plutoflyby— NASA Watch (@NASAWatch) July 15, 2015...
from NASA Watch http://ift.tt/1I1a8Bk
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