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Our moon


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Our moon

  1. 1. A look at our nearest neighbor in Space! The Moon Free powerpoints at
  2. 2. What is the Moon? <ul><li>A natural satellite </li></ul><ul><li>One of more than 96 moons in our Solar System </li></ul><ul><li>The only moon of the planet Earth </li></ul>
  3. 3. Location, location, location! <ul><li>About 384,000 km (240,000 miles) from Earth </li></ul><ul><li>3,468 km (2,155 miles) in diameter (about ¼ the size of Earth) </li></ul>
  4. 4. Birth of the Moon <ul><li>“ Born” 4-5 billion years ago </li></ul><ul><li>Formed from impact of Mars-sized “planetesimal” on Earth </li></ul><ul><li>Debris from both objects melted together to form the Moon </li></ul>
  5. 5. Cut to the Core <ul><li>3 major divisions of the Lunar interior </li></ul><ul><li>Crust - average thickness of about 70 kilometers </li></ul><ul><li>Mantle </li></ul><ul><li>Core - radius is between 300 and 425 kilometers </li></ul>
  6. 6. The Moon’s Surface <ul><li>No atmosphere </li></ul><ul><li>No liquid water </li></ul><ul><li>Extreme temperatures </li></ul><ul><ul><li>Daytime = 130  C (265 °F) </li></ul></ul><ul><ul><li>Nighttime = -190  C (-310  F) </li></ul></ul><ul><li>1/6 Earth’s gravity </li></ul>
  7. 7. Lunar Features - Highlands <ul><li>Mountains up to 7500 m (25,000 ft) tall </li></ul><ul><li>Rilles (trenchlike valleys) </li></ul>
  8. 8. Lunar Features - Craters <ul><li>Up to 2500 km (1,553 miles) across </li></ul><ul><li>Most formed by meteorite impact on the Moon </li></ul><ul><li>Some formed by volcanic action inside the Moon </li></ul>
  9. 9. Lunar Features - Maria <ul><li>Originally thought to be “seas” by early astronomers </li></ul><ul><li>Darkest parts of lunar landscape </li></ul><ul><li>Filled by lava after crash of huge meteorites on lunar surface 3-4 billion years ago </li></ul><ul><li>Mostly basalt rock </li></ul>
  10. 10. Maria Craters Can you see the rays? Does this photo show us a limb or terminator line?
  11. 11. Movements of the Moon <ul><li>Revolution – Moon orbits the Earth every 271/3 days </li></ul><ul><li>The moon rises in the east and sets in the west </li></ul><ul><li>The moon rises and sets 50 minutes later each day </li></ul><ul><li>Rotation – Moon turns on its axis every 27 days </li></ul><ul><li>Same side of Moon always faces Earth </li></ul>
  12. 12. Far Side of the Moon <ul><li>First seen by Luna 3 Russian space probe in 1959 </li></ul><ul><li>Surface features different from near side </li></ul><ul><ul><li>More craters </li></ul></ul><ul><ul><li>Very few maria </li></ul></ul><ul><ul><li>Thicker crust </li></ul></ul>
  13. 13. It’s Just a Phase <ul><li>Moonlight is reflected sunlight </li></ul><ul><li>Half the moon’s surface is always reflecting light </li></ul><ul><li>From Earth we see different amounts of the Moon’s lit surface </li></ul><ul><li>The amount seen is called a “phase” </li></ul>
  14. 14. Waxing and Waning <ul><li>New moon </li></ul><ul><li>Waxing Crescent moon </li></ul><ul><li>First Quarter moon </li></ul><ul><li>Waxing Gibbous moon </li></ul><ul><li>Full moon </li></ul><ul><li>Waning Gibbous moon </li></ul><ul><li>Third Quarter moon </li></ul><ul><li>Waning Crescent moon </li></ul><ul><li>New moon </li></ul>
  16. 17. Earth Moon Moon Plane of earth’s orbit Plane of lunar orbit
  17. 18. Lunar Eclipses <ul><li>Moon moves into Earth’s shadow – this shadow darkens the Moon </li></ul><ul><ul><li>Umbra </li></ul></ul><ul><ul><li>Penumbra </li></ul></ul><ul><li>About 2-3 per year </li></ul><ul><li>Last up to 4 hours </li></ul>
  18. 19. Solar Eclipses <ul><li>Moon moves between Earth and Sun </li></ul><ul><li>Moon casts a shadow on part of the Earth </li></ul><ul><li>Total eclipses rare – only once every 360 years from one location! </li></ul>
  19. 20. The Tides <ul><li>Tides caused by pull of Moon’s gravity on Earth </li></ul><ul><li>High tide – </li></ul><ul><ul><li>Side facing Moon and side away from Moon </li></ul></ul><ul><ul><li>Every 12 hours, 25 ½ minutes </li></ul></ul><ul><li>Low tide – </li></ul><ul><ul><li>On sides of Earth </li></ul></ul>
  20. 21. Exploring the Moon <ul><li>1950s to 1960s - probes </li></ul><ul><li>Neil Armstrong First man on the Moon – July 20, 1969 </li></ul><ul><li>Six Apollo missions (1969-1972) </li></ul><ul><ul><li>382 kg (842 lbs) rocks </li></ul></ul><ul><li>12 Americans have walked on the moon </li></ul>
  21. 24. When will we return?
  22. 25. Ice on the Moon? <ul><li>1994 – Clementine probe </li></ul><ul><li>1998 – Lunar Prospector </li></ul>
  23. 26. Moon base of the future? <ul><li>What would you need to live there? </li></ul>
  24. 29. The Lunar Challenge!
  25. 30. Name this phase! Full Moon What time does this phase rise and set?
  26. 31. Name these features. Name these features. Craters Maria
  27. 32. Does this image show us the near side or far side of the moon? Far Side How can you tell?
  28. 33. Is this line the limb or terminator? Is this line the limb or terminator? Limb Terminator
  29. 34. Name this phase! First Quarter
  30. 35. Name this phase! Waxing Crescent
  31. 36. Does this image show the near side or the far side of the moon? Near Side
  32. 37. Name this phase! Waning Gibbous
  33. 38. Name this phase! Third Quarter
  34. 39. From what direction does the moon rise? The East
  35. 40. Name this phase! Waxing Gibbous
  36. 41. Name this phase! Waning Crescent
  37. 42. What might be happening in this image? Lunar Eclipse
  38. 43. Is this line the limb or the terminator? Limb
  39. 44. Name this phase! Look closely! Waxing Gibbous
  40. 45. True or False: The Far Side and the Dark Side of the moon are the same thing. False!
  41. 46. Name this phase! Full Moon
  42. 47. Name this phase! New Moon
  43. 48. Does the moon rise or set in the west? It sets in the west.
  44. 49. Name this phase! Waning Gibbous
  45. 50. Name this phase! Waning Crescent
  46. 51. Name this phase! Waning Gibbous
  47. 52. The Mythical Moon
  48. 62. The Lunatic: Leesa Hubbard
  49. 63. Photo resources <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>
  50. 64. More photo resources <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li>http:// </li></ul><ul><li> </li></ul>
  51. 65. This powerpoint was kindly donated to is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.