Space

Space is the vast expanse that exists beyond the Earth and its atmosphere. It is a fascinating subject of study that encompasses the stars, planets, galaxies, and other celestial bodies.

Key Concepts

• Galaxies: Huge collections of stars, dust, and gas bound together by gravity. The Milky Way is our home galaxy.
• Planets: Spherical bodies that orbit a star. The eight planets in our solar system include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
• Stars: Luminous spheres of plasma held together by gravity. Our Sun is a star.
• Astronomy: The scientific study of celestial objects and phenomena.
• Space Exploration: The investigation of outer space through the use of telescopes, space probes, and manned space missions.

Study Guide

Here are some key points to remember when studying space:

1. What is a galaxy and what is our home galaxy called?
2. List the eight planets in our solar system.
3. What is a star and name our closest star?
4. Define astronomy.
5. What is space exploration and how is it conducted?

[Space] Related Worksheets and Study Guides:

• Earth in spaceScience • Third Grade