december 12, 2011
DESCRIPTION
December 12, 2011. Objective: Observe and examine spectra from different sources. Agenda: Spectroscope Lab Moon Notes Moon Video. The Moon. A look at our nearest neighbor in Space!. What is the Moon?. A natural satellite. Location, location, location!. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/1.jpg)
December 12, 2011
![Page 2: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/2.jpg)
• Objective:– Observe and examine
spectra from different sources
• Agenda:– Spectroscope Lab– Moon Notes– Moon Video
![Page 3: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/3.jpg)
A look at our nearest neighbor in Space!
The Moon
![Page 4: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/4.jpg)
What is the Moon?• A natural satellite
![Page 5: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/5.jpg)
Location, location, location!
• About 384,000 km (240,000 miles) from Earth
• 3,468 km (2,155 miles) in diameter (about ¼ the size of Earth)
![Page 6: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/6.jpg)
Moon Theories• The Fission Theory: The Moon was once
part of the Earth and somehow separated from the Earth early in the history of the Solar System. The present Pacific Ocean basin is the most popular site for the part of the Earth from which the Moon came.
• The Capture Theory: The Moon was formed somewhere else, and was later captured by the gravitational field of the Earth.
![Page 7: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/7.jpg)
• The Condensation Theory: The Moon and the Earth condensed together from the original nebula that formed the Solar System.
• The Colliding Planetesimals Theory: The interaction of earth-orbiting and Sun-orbiting planetesimals (very large chunks of rocks like asteroids) early in the history of the Solar System led to their breakup. The Moon condensed from this debris.
![Page 8: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/8.jpg)
• The Ejected Ring Theory: A planetesimal the size of Mars struck the earth, ejecting large volumes of matter. A disk of orbiting material was formed, and this matter eventually condensed to form the Moon in orbit around the Earth.
![Page 9: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/9.jpg)
The Moon’s Surface
• No atmosphere• No liquid water• Extreme
temperatures– Daytime = 130C
(265°F)– Nighttime = -190C
(-310 F)• 1/6 Earth’s gravity
![Page 10: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/10.jpg)
Lunar Features - Highlands
• Mountains up to 7500 m (25,000 ft) tall
• Rilles (trenchlike valleys)
![Page 11: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/11.jpg)
Lunar Features - Craters• Most formed by meteorite impact on the Moon
![Page 12: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/12.jpg)
Lunar Features - Maria• Originally thought to be
“seas” by early astronomers
• Darkest parts of lunar landscape
• Mostly basalt rock
![Page 13: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/13.jpg)
Maria
Craters
![Page 14: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/14.jpg)
Movements of the Moon• Revolution – Moon orbits
the Earth every 271/3 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 Moon
always faces Earth
![Page 15: December 12, 2011](https://reader036.vdocuments.us/reader036/viewer/2022062316/56816727550346895ddbc28a/html5/thumbnails/15.jpg)
Far Side of the Moon• First seen by Luna 3
Russian space probe in 1959
• Surface features different from near side– More craters– Very few maria– Thicker crust