365 Whys?
365 Whys About Space, Volume 1 book cover
365 Whys About Space · Volume 1

Planets, Moons, the Sun & Our Solar System

The solar system, broken into 365 questions kids actually ask. Why doesn't the Moon fall down? Why is Mercury hot and cold at the same time? Why does Saturn have rings and Earth doesn't? One a day, or twenty in a row when "one more" gets out of hand.

Every question gets the full treatment: a straight answer, a quick fact, a “wait, what?!” twist that makes kids look up from the page, and one line on why it matters. No padding, no cartoon mascot explaining gravity — just the real reason the universe works the way it does, told the way you'd tell a smart kid who actually asked.

Ages7–12 · reading level around 4th to 6th grade
Format8.5×11 paperback, fully illustrated
Questions365, each with the full treatment
SeriesVolume 1 of 3 · stands alone fine
ISBN9781972535080
Buy on Amazon

Sample page

Try one.

Every Why in the book gets this exact treatment. Here is № 87.

Why № 87 · 365 Whys About Space, Vol. 1

Why do we always see the same side of the Moon?

The answer The Moon spins exactly once for every lap it makes around Earth. The two motions match perfectly, so the same face points at us all the time.
Quick fact Nobody saw the Moon's far side until 1959, when a space probe flew around and photographed it.
Wait, what?! There is no "dark side of the Moon." The far side gets just as much sunlight as the side we see. It's hidden, not dark.
Why it matters The Moon face you see tonight is the exact same one every human in history has ever seen.

Also curious? Why doesn't the Moon fall down? · Why does the Moon change shape?

Rest of the series

Keep the streak going.