Download to read offline
More Related Content
Is moon
- 2. What is themoon? • A natural satellite • One of more than the 96 moons in our solar system • The only moon of the planet Earth
- 3. LOCATION AND SIZE •About 384,000 kilometers (240,000 miles) from Earth • 3,468 kilometers (2,155 miles) in diameter • About ¼ the size of Earth
- 4. Movements of theMoon • Orbit is an ellipse, not circular • Apogee (farthest from Earth) • Perigee (closest to Earth) • Revolution – Moon orbits the Earth every 27 1/3 days • The moon rises in the East and sets in the West • The moon rises and sets 50 minutes later each day • Rotation – Moon turns on its axis every 27 days • Same side of the Moon always faces Earth
- 5. As the Moon completesits revolution in about a month’s time, we always see the same side facing us. Movements of the Moon
- 6. Because the moon’s periodof rotation is equal to its period of revolution (Scientists call this SYNCHRONOUS ROTATION). Movements of the Moon
- 7. Galileo, with theaid of his telescope, was the first to explore the moon’s surface. He found that its surface is covered with crates, mountains, valleys and flat plains. Movements of the Moon
- 8. The Moon’s Surface •No atmosphere • No liquid water • Extreme temperatures – Daytime = 130°C (265° F) – Nighttime = -190°C (-310°F) • 1/6 of Earth’s gravity
- 9. The Moon’s Surface •Lunar rocks and dust cover most of the surface • This layer is called the regolith • 1 – 6 meters deep • The lack of an atmosphere let many more meteorites strike the moon’s surface, creating this layer of crushed rock. • Anorthosites are light-colored, coarse-grained rocks found in the lunar highlands. • Breccia contains fragments of other rocks that have melted together, and are found everywhere on the moon.
- 10. Lunar Features –Craters • Bowl shaped depressions • Up to 2500 kilometers (1,553 miles) across • Most formed by meteorite impact on the Moon • Some formed by volcanic action inside the Moon
- 11. Lunar Features –Craters • When meteorites struck the surface they “displaced material” • Like a “splash” • Marks left are called rays
- 12. DO YOU KNOW? There are about30,000 craters of varying sizes. TRIVIA
- 13. Lunar Features –Highlands • Mountains up to 7500 meters (25,000 feet) tall • Rilles (trenchlike valleys)
- 14. PHASES OF THEMOON
- 15. 1. New Moon •The Moon's not illuminated side is facing the Earth. • The Moon is not visible (except during a solar eclipse).
- 16. 2. Waxing Crescent •The Moon appears to be partly but less than one- half illuminated by direct sunlight. • The fraction of the Moon's disk that is illuminated is increasing.
- 17. 3. First Quarter •One-half of the Moon appears to be illuminated by direct sunlight. • The fraction of the Moon's disk that is illuminated is increasing.
- 18. 4. Waxing Gibbous •The Moon appears to be more than one-half but not fully illuminated by direct sunlight. • The fraction of the Moon's disk that is illuminated is increasing.
- 19. 5. Full Moon •The Moon's illuminated side is facing the Earth. • The Moon appears to be completely illuminated by direct sunlight.
- 20. 6. Waning Gibbous •The Moon appears to be more than one-half but not fully illuminated by direct sunlight. • The fraction of the Moon's disk that is illuminated is decreasing.
- 21. 7. Last Quarter •One-half of the Moon appears to be illuminated by direct sunlight. • The fraction of the Moon's disk that is illuminated is decreasing.
- 22. 8. Waning Crescent •The Moon appears to be partly but less than one- half illuminated by direct sunlight • The fraction of the Moon's disk that is illuminated is decreasing.
- 23. Waxing or Waning? Waxingmeans the moon is “growing”. If the moon is getting bright from the right, it is waxing. Waning means the moon is “shrinking”. If the moon is dark on the right, it is waning.
- 24.
- 25. Lunar Eclipse A lunareclipse occurs when the Moon passes directly behind Earth and into its shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned (in syzygy), with Earth between the other two.
- 26. Two types ofLunar Eclipse 1. Partial Lunar Eclipse • A portion of the Moon passes through Earth's umbral shadow. • These events are easy to see, even with the unaided eye.
- 27. 2. Total LunarEclipse Two types of Lunar Eclipse • The entire Moon passes through Earth's umbral shadow. • These events are quite striking due to the Moon's vibrant red color during the total phase (totality).
- 28. Solar Eclipse A solareclipse occurs when an observer (on Earth) passes through the shadow cast by the Moon which fully or partially blocks ("occults") the Sun.
- 29. Two types ofSolar Eclipse 1. Partial Solar Eclipse A partial solar eclipse happens when the Moon only partially covers the disk of the Sun.
- 30. Two types ofSolar Eclipse 2. Total Solar Eclipse • A total solar eclipse happens when the Moon totally covers the disk of the Sun. • An annular solar eclipse occurs when the Moon appears smaller than the Sun as it passes centrally across the solar disk and a bright ring, or annulus, of sunlight remains visible during the eclipse.
- 31. Saros is theroughly 18-year periodic cycle of the Earth-Moon-Sun system. Every 6,585 days, the Earth, Moon, and Sun are in exactly the same position. When there is a lunar eclipse, there will also be one exactly 6,585 days later. Saros
- 32.
- 33. Presented by: Sid MarnnyLopena Jymuelle Abejo Drake Lewis Garcia Bernadette Villa
Editor's Notes
- #4 About 384,000 kilometers (240,000 miles) from Earth 3,468 kilometers (2,155 miles) in diameter About ¼ the size of Earth
- #5 Orbit is an ellipse, not circular ***Apogee*** (farthest from Earth) ***Perigee*** (closest to Earth) Revolution – Moon orbits the Earth every 27 1/3 days The moon rises in the East and sets in the West The moon rises and sets 50 minutes later each day Rotation – Moon turns on its axis every 27 days Same side of the Moon always faces Earth
- #14 Mountains up to 7500 meters (25,000 feet) tall Rilles (trenchlike valleys)