Sizes-of-the-star.pptx
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This document provides information about the different sizes of stars. It discusses supergiant stars, which are the most massive and luminous stars in the universe. Examples given are Betelgeuse and Rigel. Giant stars are also covered, with Pollux and Aldebaran provided as examples. Main sequence stars like our Sun are explained as younger stars powered by hydrogen fusion. Finally, it states that low or medium mass stars will become white dwarfs at the end of their lives. Students are given an activity to determine star sizes using data and examples are provided to classify stars in multiple choice questions and an assignment.
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concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
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- 2. SIZES OF THE STAR
- 3. At the end of the lesson, students should be able to; A.Determine the different sizes of the star, b.classify the stars into its sizes, and c.relate some stars that appear in the night’s sky.
- 4. “Sizes of the Star” 1.Each group will be given an activity sheet. 2. You are going to determine the sizes of the star based on the given data on the activity sheet.
- 5. What are the different sizes of the star?
- 6. “Sizes of the Stars” Supergiant Star Giant Star Main Sequence Star White dwarf
- 7. Hertzsprung – Russel Diagram
- 8. SUPERGIANT STARS- are among the most massive and luminous stars in the universe.
- 9. Supergiants have the largest radius of all known stars. They evolve from large main- sequence stars. Supergiants can contain 8 - 200 times the mass of the Sun! They also shine brightly. The color of supergiants can be red or blue.
- 10. Red supergiants have low surface temperatures, below 4,100 K. This is very cool for a star and makes them shine with a red color. Betelguese
- 11. Blue supergiants are much hotter. They can be 12,000 to 15,000 K or above 25,000 degree Celcius, which makes them the hottest stars in the Universe. Rigel
- 12. GIANT STARS- any star having a relatively large radius for its mass and temperature; because the radiating area is correspondingly large, the brightness of such stars is high. POLLUX
- 13. . Aldebaran
- 14. Main Sequence Stars are young stars. They are powered by the fusion of hydrogen (H) into helium (He) in their cores, a process that requires temperatures of more than 10 million Kelvin. .
- 15. These stars can range from about a tenth of the mass of the sun up to 200 times as massive. . Sun
- 16. White dwarf- low or medium mass star (with mass less than about 8 times the mass of our Sun) will become a white dwarf. .
- 17. .
- 18. Multiple Choice: Choose the letter of the correct answer. 1. These are the most massive and luminous stars in the Universe a.White dwarf star c. Giant star b. Supergiant star 2. These can range from about a tenth of the mass of the Sun up to 200 times as massive. a. Main Sequence Stars c.White dwarf b. Supergiant .
- 19. 3. These are low or medium mass star (with mass less than about times the mass of the our Sun will become a.Supergiant Star c. White dwarf b.Giant star 4. Pollux has size of; a. Giant star c. White dwarf b. Supergiant Star 5.Sun has size of; a.Supergiant star c. White dwarf b. Main Sequence Star
- 20. Assignment. (In your notebook) Find a star and determine its size. Give a short explanation about it. .
Editor's Notes
- One supergiant can be as bright as a million Suns. .,
- One supergiant can be as bright as a million Suns. .,
- One supergiant can be as bright as a million Suns. .,
- Around 90 percent of the stars in the Universe are main-sequence stars, including our sun
- Around 90 percent of the stars in the Universe are main-sequence stars, including our sun
- Around 90 percent of the stars in the Universe are main-sequence stars, including our sun
- irius B is a white dwarf. It is a very faint remnant of a previous star that has ended its main sequence life, gone giant, then died. It is apparent magnitude 8.44 which means you can’t see it with the naked eye.
- Around 90 percent of the stars in the Universe are main-sequence stars, including our sun
- Around 90 percent of the stars in the Universe are main-sequence stars, including our sun