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5E-Introduction
Algebra I
Geometry
Algebra II Textbook
Calculus
Module 7
 Proportional Relationships

Exploring Stars in the Milky Way
 Objectives: Students use simple proportions and fractions to explore the number of stars in the Milky Way, and the relative sizes of some famous stars compared to our own sun. By reading a NASA press release and viewing a NASA eClips video segment, students will learn more about stars and the Milky Way galaxy.

Mathematics Skill or Topic Area:

Proportional Relationships

Next Gen Science Framework: PS4.B: Electromagnetic Radiation, ESS1.A: The Universe and Its Stars, ETS2: Links Among Engineering, Technology, Science, and Society

Common Core ELA for Science: RST.6-8.2. Determine the central ideas or conclusions of a text; provide an accurate summary of the text distinct from prior knowledge or opinions. RST.6-8.8. Distinguish among facts, reasoned judgment based on research findings, and speculation in a text. RST.6-8.9. Compare and contrast the information gained from experiments, simulations, video, or multimedia sources with that gained from reading a text on the same topic.

Common Core Math Standard: 6.RP.1 Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities; 6.RP.3 Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.

Video Engagement: Seeing Stars This NASA eClips video segment lets students look through a telescope's lens for a closer look at planets and star clusters. Students learn about the habitable zone, the Orion Nebula and the Whirlpool Galaxy. (4 minutes). View Program

Explore math connections with

SpaceMath@NASA

Problem I - Counting Stars using Ratio and Proportion - Students use ratio and proportion to estimate the number of stars in the sky from a single photograph like the one shown below. [Open PDF ]

Problem II - How Common are Stars like our Sun? - Astronomers classify stars so that they can study their similarities and differences. A very common way to classify stars is by their temperature. In this problem students will discover how common stars, like our sun, are in the Milky Way. [Open PDF ]