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By the Author
![Ask an Astronaut](https://www.hachettebookgroup.com/wp-content/uploads/2017/10/97803165127871.jpg?w=184)
Ask an Astronaut
![Hello, Is This Planet Earth?](https://www.hachettebookgroup.com/wp-content/uploads/2017/06/9780316512756.jpg?w=190)
Hello, Is This Planet Earth?