🌌 Galaxies Explorer

The Milky Way and beyond · Types of galaxies · Scale of the universe · Grades 3–8

📉 Scale of the Universe

• Our solar system is about 0.001 light-years across
• The Milky Way galaxy is about 100,000 light-years across
• The nearest galaxy to us (Andromeda) is 2.5 million light-years away
• The observable universe is about 93 billion light-years across
• There are an estimated 2 trillion galaxies in the observable universe

🎯 Galaxy Quiz!

About This Space Tool

This free interactive space and astronomy tool helps students explore the wonders of the universe. Space science covers everything from our solar system to distant galaxies and is one of the most exciting topics in science education. Studying space develops curiosity, scientific thinking, and an appreciation for the scale and beauty of the cosmos.

Interactive space tools let students explore celestial objects, compare sizes and distances, and understand astronomical phenomena in an intuitive visual way. All tools are free, require no login, and align with science standards for elementary and middle school.

How to Use

Explore the interactive content above to learn about space. Click on objects to discover fascinating facts. Take the quiz to test your knowledge. Perfect for science class or curious kids who love looking at the stars.

Last reviewed: April 2026