Emma Grey Ellis
Earth's size compared with the updated size of Pluto and its moon Charon.NASA When I was my 7-year-old daughter's age, I would have argued with you about the size ofPluto. I had a book with pictures of all the planets on a single page, and it definitely looked to me like the n...
Why is the surface of Pluto's largest moon cracked andfracturing? There's something in the...Fedde, Corey