Our galaxy and others are explored in this volume, which describes what a star island is, how big is our own galaxy, what is a galactic year, and the different kinds of galaxies

The third planet from the Sun, Earth is the only planet known to support life. Nicknamed the "Blue Planet," Earth has a unique mix of air, water, and land unlike anything else scientists have seen on other planets.

The fifth planet from the Sun, Jupiter is the largest planet in the solar system. Jupiter is a giant planet made up of swirling gases and powerful winds.

The planet closest to the Sun, Mercury is the smallest planet in the solar system. Nicknamed the "Swift Planet," it orbits the Sun faster than any other planet. Mercury is known for its extreme heat and steep cliffs.

The sixth planet from the Sun, Saturn is known for its rings. These rings can be seen from Earth using a telescope. Saturn also has dozens of moons, including the only moon in the solar system known to have a thick atmosphere.

The second planet from the Sun, Venus is the closest planet to Earth. Venus is almost the same size as Earth, but the two planets are actually very different.