1 / 56

STARS--studying ancient light passing through time and space

STARS--studying ancient light passing through time and space . The Universe is made up of islands of stars… . There of billions of these islands and inside each island there are billions of stars. Stellar Evolution. A look at the stars from their birth to their death. STELLAR SPECTRAL CLASS.

Sharon_Dale
Download Presentation

STARS--studying ancient light passing through time and space

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. STARS--studying ancient light passing through time and space

  2. The Universe is made up of islands of stars…

  3. There of billions of these islands and inside each island there are billions of stars.

  4. Stellar Evolution A look at the stars from their birth to their death

  5. STELLAR SPECTRAL CLASS Grouping the stars based on their temperatures

  6. Each class of star has a unique pattern of lines (“bar code”) to identify it. Hydrogen Hydrogen Hydrogen Sodium “Hottest” “Coldest”

  7. Hertzsprung-Russell Diagram Comparing temperature and brightness for various stars

  8. What color stars are hottest? Coldest? Red Super Giants Red Giants MAIN SEQUENCE COLOR AND TEMPERATURE ARE RELATED! White Dwarfs

  9. Which groups of stars are the BRIGHTEST?

  10. Which group of stars is the HOTTEST?

  11. Which groups of stars are the SMALLEST and DIMMEST?

  12. Now let’s take a look at a specific star—one familiar to all of us.

  13. THE SUN A DYNAMIC NUCLEAR REACTOR

  14. What is the color, temperature and Luminosity of the Sun?

  15. Solar absorption spectrum for the Sun (a typical “G” star)

  16. This pattern would be different for stars of a different color and temperature.

  17. SUN’S VISIBLE SURFACE MAGNETIC STORMS ON THE SURFACE OF STARS CAN BE SEEN AS A COOLER, DARKER AREA

  18. SOLAR MAGNETIC FIELD ENERGY IS TRANSFERRED FROM ZONE TO ZONE BY MAGNETIC LINES OF FORCE

  19. Stars form in gas nebulas They collect gas from their surroundings They enter the main sequence at various points depending on how much mass they collect

  20. HIGH MASS STARS LOW MASS STARS

  21. Betelgeuse Orion Nebula Rigel

  22. Which star is brighter? They are about the same! Which star is hotter? RIGEL

  23. Orion Nebula

  24. Here is an example of a Red Supergiant This is Betelgeuse, the first star after the sun whose surface was imaged in photographs

  25. SOLAR MASS EJECTION EXPLOSIVE ERUPTIONS OF GAS SEND LARGE AMOUNTS OF HIGH ENERGY RADIATION AND PARTICLES INTO SPACE

  26. Stars on the main sequence near our Sun blow away their outer atmospheres to become White Dwarfs

  27. Large mass, hot stars burn fuel quickly. When they run out, there is no outward pressure to balance out gravity. Therefore, the star collapses inward. This compression rapidly heats the gases to billions of degrees. This creates a huge explosion…

  28. Supernova! The intense explosion forces the gases outward, away from the core…creating a NEW NEBULA

  29. NEUTRON STAR: Tiny and dense remains of the a star’s core. Left behind after the outer layers were blown off.

  30. The basic structural unit of the universe appears to be the galaxy. A Galaxy is a collection of billions of stars an various amounts of gas and dust held together by gravity.

  31. Just like stars, galaxies come in a variety of types. Here are a few examples.

  32. Elliptical Galaxy

  33. Spiral Galaxy

  34. Representation of the Milky Way Galaxy

  35. Spiral Galaxy (The Andromeda)

  36. Barred Spiral

  37. ROTATION OF THE SUN STARS ROTATE. WE USE SURFACE FEATURES LIKE SUNSPOTS TO MEASURE THE RATE.

More Related