Long ago, in Italy, lived a man named Galileo. He loved the stars.

Every night, Galileo looked up, dreaming about the sky's mysteries.

Galileo saved money, wanting something to see the stars closer.

One day, he bought a tool, a telescope, to gaze at the stars.

With the telescope, stars were not just dots. They had shapes!

He saw that the moon was not smooth, but had mountains!

Galileo took notes and made drawings of the moon's surface.

He also found out there were other moons, around Jupiter.

People did not all believe him, thinking the stars were unchanging.

But Galileo kept watching and learning, writing down his findings.

Then he shared his findings, telling everyone about the sky.

His work showed us that the sky is full of wonders to discover.