1 / 15

December 21, 2011

December 21, 2011. Objective. Agenda. Identify the scientists that contributed to modern astronomy. The Sun Quiz at the end of watching History and tools of Astronomy Notes IMAX: Space Station Review for test TEST TOMORROW. Ancient Greeks. Early Astronomy .

adrina
Télécharger la présentation

December 21, 2011

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. December 21, 2011

  2. Objective Agenda • Identify the scientists that contributed to modern astronomy • The Sun • Quiz at the end of watching • History and tools of Astronomy Notes • IMAX: Space Station • Review for test • TEST TOMORROW

  3. Ancient Greeks Early Astronomy  Geocentric Model = Ptolemy Greek Astronomer • In the ancient Greeks’ geocentric model, the moon, sun, and the known planets—Mercury, Venus, Mars, and Jupiter—orbit Earth.  Heliocentric Model = Nicolaus Copernicus • In the heliocentric model, Earth and the other planets orbit the sun.

  4. Retrograde motion of the Planets Planets usually move from W to E relative to the stars, but sometimes strangely turn around in a loop, the so called retrograde motion.

  5. The Birth of Modern Astronomy Early Astronomy  Nicolaus Copernicus • Copernicus concluded that Earth is a planet. He proposed a model of the solar system with the sun at the center. Heliocentric Model This model explained the retrograde motion of planets better than the geocentric model.

  6. The Birth of Modern Astronomy Early Astronomy German astronomer Johannes Kepler (1571-1630) helped establish the era of modern astronomy by deriving three laws of planetary motion.

  7. Early Astronomy  Galileo Galilei Italian scientist Galileo Galilei (1564—1642) used a new invention, the telescope, to observe the Sun, Moon, and planets in more detail than ever before.

  8. Early Astronomy  Sir Isaac Newton English scientist Sir Isaac Newton (1642—1727) explained gravity as the force that holds planets in orbit around the Sun.

  9. Astronomical tools • Refracting telescope • Uses a lens (called the objective) to bend (refract) the light to produce an image

  10. Astronomical tools • Reflecting telescope • Uses a concave mirror to gather the light

  11. The 200" (5m) Hale Reflector of Palomar Observatory is shown above. Until recently it was the world's largest optical/infrared telescope.

  12. Radio Telescope A steerable radio telescope at Green Bank, West Virginia

  13. Radio Telescope The 300-meter radio telescope at Arecibo, Puerto Rico

  14. The value of the space program • Personal Computers • Colorization of black and white movies • Solar powered calculators • Aluminized bags for snack food • Weather satellites • Halogen lights for cars • Sports domes • Microwave Ovens • Pocket calculators • Phone calls by satellite • Laser guided missiles • "Mylar" balloons • "Blue Blocker" sunglasses • Digital watches and thermometers • "DirecTV", "Dish Network", etc • "Kevlar" for bullet proof vests • "Mini Mag" flashlights • Fishing line • Fiber optics for phone calls • "Vortec" engines in GM cars • "Ovation" guitars and helicopter blades • Medical scanners • Electronic ignition in automobiles • Laser scanners in stores • "Bulb Miser" devices for long life light bulbs • Weather Maps on television • Juice boxes for "Hawaiian Punch", etc • "The Patch" medical device • Breathing systems for Mt. Everest climbers, Scuba divers and firefighters • “Flexon" eyeglasses and dental braces • Cellular phones and beepers • Cable Television, H B O, Showtime, etc • Pens that write upside down and under water • Anti corrosive paint for bridges, boats & Statue of Liberty • Scratch resistant coatings on sunglasses • Football helmets for the NFL • Pacemaker batteries that last 20 years and can be recharged through the skin. • Compact Disks • GPS Navigation Systems

More Related