你好,世界!系列的图书旨在帮助父母向婴幼儿介绍一些简单的非虚构类概念。现在，即使是最小的孩子也能学习他们周围的世界。

每一个小孩都喜欢仰望夜空中的月亮。现在，这本书可以教他们有关太阳，月亮，星星，行星的事，他们的颜色，形状，尺寸，和超级简单的事实（你能指出这个红色星球吗？那是火星！）

Hello, World! is a series designed to help parents introduce simple nonfiction concepts to babies and toddlers. Now even the youngest children can enjoy learning about the world around them.

Every young child loves to look up at the moon in the night sky. Now here’s a book that can teach toddlers about the sun, moon, stars, and planets—with colors, shapes, sizes, and super-simple facts (“Can you point to the red planet? That’s Mars!”).