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Danh ngôn của Alan Stern (Sứ mệnh: 5)

I tend to think of Pluto and its moons as presents sitting under a Christmas tree. They're wrapped, and from Earth all we can do is look at the boxes to see whether they're light or heavy, to see if something maybe jiggles a bit inside. We're seeing intriguing things, but we really don't know what's in there.
If you go to planetary science meetings and hear technical talks on Pluto, you will hear experts calling it a planet every day.