高一英语外研版必修4(天津)课件module 6 period one introduction,reading and vocabulary
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②However,it's still to be determined whether the announcement will capture the public's attention like previously revealed New Moons.Either way,it should be a decidedly more pleasant experience for all involved.The new paper titled “The population of natural Earth satellites,” from Cornell University's Mikael Granvik,Jeremie Vaubaillon and Robert Jedicke states that these “secret moons” enter and exit the Earth's orbit without notice. “At any given time,there should be at least one natural Earth satellite of 1­meter diameter orbiting the Earth,” Granvik writes.