1 / 17

Luna, The Moon

Luna, The Moon. Ch 21.4. The Moon. Except for the Sun, the Moon affects us more than any other celestial body…tides & eclipses. A few facts:. Diameter: 3476 km Density: 3340 kg/m 3 Sidereal month: 27.32 days (one orbit about the Earth)

falala
Download Presentation

Luna, The Moon

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. Luna,The Moon Ch 21.4

  2. The Moon • Except for the Sun, the Moon affects us more than any other celestial body…tides & eclipses.

  3. A few facts: • Diameter: 3476 km • Density: 3340 kg/m3 • Sidereal month: 27.32 days (one orbit about the Earth) • Rotates on its axis at the same rate as it orbits the Earth. • Avg Distance from Earth: 384,400 km (measured by lasers to reflectors on Moon)

  4. Phases of the Moon • http://www.enchantedlearning.com/subjects/astronomy/ • http://www.classzone.com/books/earth_science/terc/content/visualizations/es2503/es2503page01.cfm • Complete the phases of the moon diagram

  5. Answers

  6. Lunar Eclipses • Penumbra = shadow within which sunlight is partially blocked • Umbra = shadow within which sunlight is completely blocked (Total eclipses) • http://www.classzone.com/books/earth_science/terc/content/visualizations/es2504/es2504page01.cfm

  7. Lunar Eclipses http://www.enchantedlearning.com/subjects/astronomy/moon/Lunareclipse.shtml http://www.mreclipse.com/Special/LEprimer.htm l Write a description of a lunar eclipse and label the diagram.

  8. Lunar Eclipse

  9. Lunar Eclipse Answers

  10. Solar Eclipses • Umbral shadow of the moon is only about 150 km wide where it reaches the earth • http://www.classzone.com/books/earth_science/terc/content/visualizations/es2505/es2505page01.cfm

  11. Solar Eclipse http://www.enchantedlearning.com/subjects/astronomy/sun/solareclipses.shtml http://www.mreclipse.com/Special/SEprimer.html Write a description of a solar eclipse and label the diagram.

  12. Solar Eclipse Answers

  13. Lunar Surface • Highlands = light colored rock • Maria = dark areas, smooth, dark solid lava flows flooded the basins • Rilles = deep channels perhaps caused by volcanic activity • Craters = depressions from meteoroid impacts • Rays = displaced material

  14. Interior • Seismologists look at seismographs and see weak quakes • 4 seismometers were placed during Apollo landings • Crust is thin on the side towards Earth • Crust is thick on back side • Perhaps has a small, partially molten metallic core • Little of no volcanic activity has taken place in 3 billion years

  15. Chemical composition • Similar to the silicate rocks of the Earth’s crust • Water is nearly absent

  16. Atmosphere • The moon has a minimal atmosphere since gases escape almost immediately.

  17. Other moons • Mars • Asteroids caught by Mar’s gravity • Jupiter • Io = volcanically active • Saturn • Frozen water with rocky material • Uranus • Ice, rock & heavily cratered • Neptune • Triton revolves in retrograde orbit & geologically active • Pluto • Charon

More Related