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The Size of Space ALL-IN-ONE Lesson | Astronomy

Grade Levels
9th - 12th, Homeschool
Formats Included
  • Zip
Approx. 100 pages (including PDF and editable pptx and docx versions)
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  1. If you are overwhelmed or intimidated by teaching Astronomy or Space Science you are in luck! This bundle of resources includes everything you could ever ask for: lesson plans, PowerPoint presentations, student notes, practice questions, formative assessment pieces, and creative activities. BONUS: A
    Save $30.00
  2. I LOVE Astronomy! One of my life's missions is to help more people understand the wonders of space and appreciate the Earth. I hope these Astronomy resources will find a home in your classroom and spark curiosity and excitement in your students.This zipped folder will include all of my present and
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Everything you need to teach about measuring space! Students will learn what to measure with meters, kilometers, astronomical units and light-years. The definition of the astronomical unit and light-year are given, with a brief mention of parsecs (but no calculations with parsecs). This is a highly mathematical lesson with many calculations involved. Students should know how to work with scientific notation for this lesson.

This multi-day lesson includes an activity in which students create a scale model of the solar system from the Sun to the far edge of the Kuiper Belt. Another scale is used to model the sizes of the eight planets and two of the dwarf planets.

Student learning goals for the Size of Space Lesson:

  • Identify the need for different units of length when measuring distances in space.
  • Identify the most appropriate unit of measurement and convert a distance between units.
  • Scale-down astronomical distances to an appropriate amount (i.e. fitting the solar system onto a receipt tape or length of string).

This lesson can be split across three days (or four for shorter class periods):

Day 1: PowerPoint lesson and note.

Day 2: Scale model calculations and begin creating the model.

Day 3: Complete scale model, additional practice questions.

Please examine the images and preview above to see how this resource can help you and your students.

In the zipped file, you will receive:

★ 2-page lesson plan.

★ 12-slide editable PowerPoint presentation with hyperlinks to YouTube videos.

★ 2 pages of notes that align with the presentation and 1 page of homework questions practicing identifying the most appropriate unit of measurement and unit conversions.

★ 1-page review note defining the astronomical units and light-years.

★ 5-page scale model activity.

★ 2 additional homework pages of practicing scale calculations.

★ 21 pages of editable task cards that can be used as formative assessments. 8 pages of quick checks to be used during class and 8 pages of retrieval practice questions to be later in the unit. For ease of use, these are included as all-different on a page, and all-the-same on a page (PDF file and editable PowerPoint file so you can add your own too!).

Complete answer keys for all notes and calculations.

ALL RESOURCES IN THIS LESSON ARE EDITABLE: The PowerPoint presentation, lesson plans, student and teacher notes, homework, and bell ringers are all editable. File types are Word docx, PowerPoint pptx, and PDF versions are included for each.


This lesson can further be supported by the Size of Space Doodle Notes.

This resource is part of my Astronomy all-in-one Lesson Bundle that is supported by (but does NOT include) my Astronomy Doodle Notes Bundle.

If you are interested in using the doodle notes with these lessons your best value is to purchase the Astronomy Growing Bundle. This bundle includes all the lessons, PowerPoint presentations, practice and activities as well as all the doodle notes and anchor charts. When additional lessons are added, you can be notified by following my store.

You can see the other resources in the Astronomy all-in-one Lesson Bundle by clicking the links below. Please follow my store for notifications when new resources are added to the bundle.

The Big Bang Theory


The Solar System


Hertzsprung-Russell Diagrams (H-R Diagrams)



Asteroids and Comets

Earth’s Seasons

Moon Phases


Solar and Lunar Eclipses


Life on Planet Earth

Revolutionary Astronomers

Dangers of Living in Space

Size of Space

Total Pages
Approx. 100 pages (including PDF and editable pptx and docx versions)
Answer Key
Teaching Duration
3 days
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