Nebulas, Stars and the H-R Diagram

Unravel the cosmos! Discover nebulae, stars, and master star classification using the H-R Diagram.

Vocabulary Match the vocabulary with the words. nebula cloud of gas and dust star hot ball of gases galaxy a group of millions or billions of stars, together with gas and dust, held together by gravity. constellation a group of stars that make a picture in the sky energy Another word for power. Luminosity The brightness of a celestial object. STARS 1. Stars are huge burning sphere of gasesheld together by gravity .2. Stars are composed mainly of the elements Hydrogenand Helium.3. Stars burn these elements to make energy. NEBULAS 1. A nebula is a huge cloud of dustand gasin space held together by gravity, they are also referred to as star nurseries.2. Nebulas are made up of the gases Hydrogenand Helium.3. Some are areas where new starsare being formed, while others are deador dying stars.4. An example of a nebula is the Eagle Nebula. H-R DIAGRAM 1. A chart that graphs a star’s brightnessand temperature.2. Temperature decreases as you move toward the RIGHT --> of the chart.3. Brightness increasesas you move toward the TOP of the chart.4. The category or type of star from YOUNG to OLD: Main Sequence, Giant, Supergiant and White Dwarf5. The color of stars from HOT to COOL: Blue, White, Yellow, Red-Orange, Red H-R Diagram Star Types Label each type of star on the diagram.Choices: Main Sequence, Giants, Supergiants and White Dwarfs Main sequence White dwarfs Giants Supergiants STAR IDENTIFICATION Use the chart to answer the questions. Name a HOT and BRIGHT star. Sirius B Sun Zeta Eridani Name a COOL and BRIGHT star. Betelguese Procyon B Barnard's Star Name HOT and DIM star. Polaris Sirius B Spica Name COOL and DIM star. Episilon Eridani Deneb Rigel How is the H-R Diagram used to classify stars? Write your response with a MINIMUM of 2 sentences.