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Milky_Way_Galaxy_20 slides Presentation.pptx
- 1. Exploring the MilkyWay Galaxy A Journey Through Our Galactic Home Presenter Name | Date
- 2. What is theMilky Way? • • A barred spiral galaxy • • Contains our Solar System • • One of billions in the universe
- 3. Milky Way QuickFacts • • Estimated 100–400 billion stars • • Diameter: ~100,000 light-years • • Age: ~13.6 billion years
- 4. Structure of theMilky Way • • Central bulge • • Spiral arms • • Galactic halo • • Dark matter envelope
- 5. The Galactic Center •• Supermassive black hole: Sagittarius A* • • Extremely dense star region • • Emits X-rays and radio waves
- 6. Spiral Arms • •Home to young stars and nebulae • • Four main arms: Perseus, Sagittarius, Centaurus, and Norma • • Site of active star formation
- 7. Our Location inthe Milky Way • • Solar System is in the Orion Arm • • About 27,000 light-years from the center • • Orbiting at 828,000 km/h
- 8. Composition of theGalaxy • • 90% dark matter • • 9% stars and stellar remnants • • 1% interstellar gas and dust
- 9. Stars in theMilky Way • • Various types: main-sequence, giants, dwarfs • • Lifespan depends on mass • • Some stars have planetary systems
- 10. Nebulae and StarFormation • • Birthplaces of stars • • Examples: Eagle Nebula, Orion Nebula • • Formed from gas and dust clouds
- 11. Stellar Evolution • •Star life stages: Protostar → Main Sequence → Giant → Remnant • • End as white dwarf, neutron star, or black hole
- 12. Black Holes inthe Milky Way • • Many stellar black holes • • Sagittarius A* at the center (~4 million solar masses)
- 13. Dark Matter andHalo • • Invisible matter • • Provides extra mass to hold galaxy together • • Detected by gravitational effects
- 14. Motion of theMilky Way • • Rotates on its axis • • Orbiting the Local Group center of mass • • Moving toward the Andromeda Galaxy
- 15. The Milky Wayand Other Galaxies • • Part of the Local Group • • Neighboring galaxies: Andromeda, Triangulum, Magellanic Clouds
- 16. Andromeda Collision • •Will collide with Andromeda in ~4.5 billion years • • Merger will form a new galaxy: Milkomeda
- 17. Studying the MilkyWay • • Telescopes: optical, radio, X-ray • • Space missions: GAIA, Hubble, JWST • • Mapping stars and galactic structure
- 18. Mysteries of theMilky Way • • Nature of dark matter • • Formation history • • Unseen planets and exoplanets
- 19. Why It Matters •• Understanding our origins • • Clues about life beyond Earth • • Fundamental to astrophysics
- 20. Thank You /Q&A • • Questions? • • Contact info / further reading suggestions