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Welcome to the

Welcome to the. Welcome Hobgood Elementary “Final Mission”. What Causes Our Seasons ?. ROT A TE X I S. REV O LVE R B I T RAVELS AROUND THE SUN. REV O LVE R B I T. ROT A TE X I S. Our axis tilts 23.5°.

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  1. Welcome to the Welcome Hobgood Elementary “Final Mission”

  2. What Causes Our Seasons ?

  3. ROTATE X I S

  4. REVOLVE R B I TRAVELS AROUND THE SUN

  5. REVOLVE R B I T ROTATE X I S

  6. Our axis tilts 23.5°

  7. The tilt of the axis gives us seasons.

  8. Pop Quiz

  9. This show us… ?

  10. This show us… ?

  11. This show us… ?

  12. What Causes Our Seasons ?

  13. Welcome to Lunar Tours

  14. Our stops along the way 1. 2. 8. 3. 4. 7. 6. 1. 5.

  15. 1. Crater Plato 63 miles wide Plato Crater is in the north, southeast of the Alps. It looks like a dark puddle against lighter soil.

  16. 1. Crater Plato 2. Mt. Pico

  17. Crater Plato Mt. Pico Mt. Piton Zooming in…

  18. Zooming in a little bit more… 1. 63 miles 2.

  19. Maria on the Moon Mare Serenitatus Sea of Serenity 3. 4. Mare Tranquilitatus Sea of Tranquility

  20. 5. Crater Tycho Tycho Crater is near the moon’s south pole. The crater is easy to see, 53 miles across! A bright ejecta blanket surrounds the crater. Rays of ejecta extend across the lunar surface. Photo is courtesy of the Lunar and Planetary Institute.

  21. 6. Crater Copernicus Copernicus has a circular rim with 3 terraces In the wall.

  22. 6. Copernicus Crater 5. Tycho Crater

  23. 7. Crater Aristarchus Aristarchus Crater is very important to NASA. It has titanium oxide which could possibly be broken down to make oxygen.

  24. 8. Mare Imbrium Sea of Rains

  25. Volcanic Features Hadley Rille There are lava tubes, lava channels, lava domes, and basaltic plains on the Moon. What do these things prove to us?

  26. The far side of the moon.

  27. 1. 2. 8. 3. 4. 7. 6. 1. 5.

  28. Credits: NASA, ESA, Anglo-Australian Observatory, and JPL. Regarding Hotels in Space: Speech by Barron Hilton, President, Hilton Hotels Corporation 1967 Conference Proceedings (AAS 67-126), American Astronautical Society (AAS) U.S. News & World Report, June 1, 1998 “If it's Tuesday, this must be the Moon”, San Francisco Examiner

  29. Black Holes

  30. What is a black hole? Strange object A heap of matter in a small space Not a hole Itis very, verydenselypacked! Gravity is so strong, even light cannot escape.

  31. o More density means more gravity!

  32. Gas + Dust = Mass How does a star become a black hole? First, we need to know how a star is born. Pressure and heat ignite the gas… a star is born! Rigel, a Blue Giant

  33. Inside every star… OPPOSING FORCES keep the star stable Energy pushes out Gravity pushes in

  34. What happens when a car runs out of fuel? The car stops. The engine dies. What happens when a star runs out of fuel? Nuclear fusion stops. The star dies.

  35. No gas, no energy! No energy force pushing out! Now the star is UNSTABLE! No Gas In the boxing ring: Energy vs. Gravity!

  36. Our Sun is a medium size star. When our Sun runs out of fuel, it will die. But it will not explode. It will gently puff up. There’s not enough “mass” for an explosion.

  37. Poor Betelgeuse… It is much bigger than our Sun. It has a lot of mass! One day it will explode. Then it will probably become a white dwarf. Betelgeuse

  38. Rigel isSEVENTY TIMESbigger than our Sun! It has much more MASS! It is REALLYSUPERBIG! When a supermassive star explodes…

  39. …SUPERNOVA! Supernova 2006GY Only stars with a great deal of mass likeblue giants will go supernova!

  40. And the new boxing champion is… Gravity! Gravity pushes in and there is a collapse!

  41. Binary Systems Centers of Galaxies Where are black holes? Quasars? Globular Clusters

  42. Sagittarius A* The center of our galaxy, the Milky Way, 26,000 LY from us. A light echo from an x-ray outburst reflected off gas clouds. Announced Jan. 2007 Image by Chandra over 9.3 days

  43. We think the Milky Way’s black hole has a mass of about 3 million Suns. Huge black holes have been found in the center of some galaxies. The black hole in the center of our galaxy is too far away to bother us!

  44. How big are black holes? Size depends on their MASS! 1. Mini black holes? (Maybe) 2. Stellar black holes 3. Intermediate Mass black holes 4. Supermassive black holes!

  45. Cygni X-1 Stellar Black Hole It is “seen” as a supernova or gamma ray burst.

  46. Stellar black holes can have about 10 times the mass of the Sun. Intermediate black holes are larger than the stellar black holes yet smaller than the supermassive ones. Supermassive black holes are a few MILLIONS times the mass of the Sun.

  47. We think the Milky Way’s black hole has a mass of about 3 million Suns. That would make it a supermassive black hole.

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