1 / 20

Galaxies Can Be Weird …just like Michael

Explore the intriguing world of galaxies - from the vastness of the Milky Way to the mysteries of Andromeda and beyond. Discover the structure, classifications, and clusters of galaxies, and ponder the profound questions of the universe. Your cosmic mission awaits!

lee-romero
Télécharger la présentation

Galaxies Can Be Weird …just like Michael

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. Galaxies Can Be Weird…just like Michael

  2. Hubble Deep Field - 2004 • Thumb nail of the sky.

  3. HDF – Close Up

  4. Approximately100 Billion Galaxies !!! • Northern Hemisphere can see Andromeda – 200 million ly away • Southern Hemisphere can see the large and small Magellanic clouds. – approx. 180 kly away

  5. The Milky Way Barred Spiral Galaxy

  6. Milky Way Facts • Rotational Speed of roughly 780,000 km/h • We are midway between the Orion and Perseus arms about 26 kly from the center. • The sun rotates once every 230 million years. Near the core only decades to rotate. • Center of the galaxy is Sagittarius A, a 3 million solar mass black hole • 300 + billion stars • 100,000 light years in diameter.

  7. Milky Way Structure

  8. More about structure • O-B associations – open clusters (young hot stars=population 1) define the arms. • Globular Clusters (100’s of thousands of older stars=population 2) inhabit the halo • Galactic center = Population 2 stars and a giant super massive black hole (several million stars) • 350 ly from center is the Great Annihilator. • Why does it “stick” together? Dark Matter Halo?

  9. Problems • Is the Milky Way the universe or not? • Viewing problems • Hubble tackles the problem using luminosities • Looking back in time at quasars

  10. Classifying Galaxies

  11. Elliptical GalaxyHot and early star formation = 60%older stars and very little formation

  12. Spiral GalaxySombrero Galaxy NGC 4594Long and slower sustained star formation = 25-30%

  13. Irregular GalaxyGalaxies that are gravitationally deforming each other.

  14. Active Galaxies • Radio, Quasars, Seyferts Image Courtesy of http://www.linnaeus.uu.se/online/phy/macrocosmos/agn.html

  15. Clusters • Poor Clusters – 10’s of galaxies or so • Rich Clusters – 1000’s of galaxies! • Super Clusters! – 10’s of clusters.

  16. Local Group • 10 million light years across • Major players: Milky Way, Triangulum, and Andromeda • Magellanic clouds are nearby • Sagittarius Dwarf Elliptical being torn apart • Merger is our probably destiny. • Andromeda and Milky Way are locked and closing at 1 million k/h. They will meet in 4 billion years

  17. Virgo Super Cluster

  18. The Universal Distribution

  19. What could be out there?

  20. Your Mission… • Create a graphic analogy that compares galactic structures to people. (3/4/5) • Create an layered image displaying a galactic center, O-B associations, dark matter, molecular clouds (HII), and density waves. (4/5) • How are active galaxies like being at a night club? (3/4) • Create a marching band routine route to show Charger fans all the different types of galaxies. (3/4/5) • Create a “kid accessible” visual guide to the galaxies. (4/5)

More Related