


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.68.2. Determine the central ideas or conclusions of a text; provide an accurate summary of the text distinct from prior knowledge or opinions. RST.68.8. Distinguish among facts, reasoned judgment based on research findings, and speculation in a text. RST.68.9. 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 realworld 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 ] Explain your thinking: Write your own problem  Using information found in the Math Connection problems, the press release or the video program, create your own math problem. Explain why you set the problem up this way, and how you might find its answer. Evaluate your understanding: Challenge Problem  Our Sun Compared to Other Stars  Stars come in many different sizes. Our sun has a diameter of about 1.5 million kilometers. Other stars can be 1000 times smaller or 1000 times bigger than this. In this problem students will follow number clues to compare the sizes of some familiar stars. [Open PDF] 

NASA / JPL 3D Solar System 

Extend your new knowledge  Compare the sizes of stars to the orbits of planets in our solar system [ Open PDF ] 
