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There is a misprint in the book on page 78. The actual quote from Neil Armstrong is, "It suddenly struck me that that tiny pea, pretty and blue, was the Earth. I put up my thumb and shut one eye, and my thumb blotted out the planet Earth. I didn't feel like a giant. I felt very, very small."

The first website link for Activity 3 has been updated.

• link: https://astro.unl.edu/naap/lps/animations/lps.html

The website link for the Introduction has been updated.

• link: https://science.nasa.gov/moon/tides/

The website link for Activity 6 has been updated.

• link: https://science.nasa.gov/neptune/moons/

this is a free, fast, and easy website to digitally generate your crossword.

• link: https://crosswordlabs.com/