WOFL13 天
NASA's Power to Explore Student Challenge
NASA is inviting U.S. students from kindergarten to 12th grade to participate in its fourth annual Power to Explore Student ...
来自MSN1 个月
‘Dark comets': Nasa studies mysterious new kids in our solar system
As Farnocchia pointed out, "there could be way more dark comets than we know" in the inner Solar System, which highlights the importance of studying these objects. NASA has now been using advanced ...