PPT-Telescopes

Optical Telescopes Ground based and on satellites Observations are recorded using a camera instead of the human eye most times This is so we can separate colors into light and using times to study changes over time. Telescopes and the group project• As an exciting new experiment each group will build their telescope• Then each of you will carry out an observing project to assess the likelihood • We Essential Questions- You should be able to answer these questions by the end of the PowerPoint.. What is the purpose of a telescope?. How do refracting telescopes work?. How do reflecting telescopes work?. Telescopes. Key Concepts. What are the regions of the electromagnetic spectrum?. What are telescopes and how do they work?. Where are most large telescopes located?. Telescopes - Key Terms. Telescope. Telescopes were first invented around the year 1600. . Galileo . Galilei was an early astronomer who first used telescopes to view objects in our solar system. . He . made many important discoveries including: the moon was covered in mountains and Jupiter had 4 large moons.. Jon Holtzman. NMSU Astronomy. Telescopes are light buckets: bigger buckets collect more light, and faint (far away) objects don’t produce much light!. Why build bigger telescopes?. In principle, bigger telescopes make sharper images:. The most important property of a telescope? . No, it’s not it’s “power” or magnifying ability, it is……. Its . Light Gathering . power! So, . t. he diameter of the mirror or lens is THE most important property. Types of Telescopes. A telescope collects light over a large area and focuses it in a . small area where it can be viewed with an eye or a camera. This can be done in 2 ways:. Refracting Telescopes. How astronomers study space. Electromagnetic Radiation (EMR). Light can travel through empty space. All EMR travels at the speed of light. . 3 x 10. 8. m/sec. Astronomers study different types of EMR. Why . do we need telescopes?. Humans can only see 6000 stars at night and cannot resolve (discern) the detail of objects in the sky if they are too close together. . Humans also cannot see anything but visible light. . Refraction is the _____________ of light as it passes through glass.. II. Reflection: . Reflection occurs when light _____________ off of a mirror.. F. f. I. Refraction: . Refraction is the ___. bending. History. In 1773 Herschel invented a large . reflecting . telescope and discovered Uranus. This was the first “new” planet.. In late 1800’s . Kuiper. found methane gas in Saturn’s moon with the largest . SPECTROSCOPY. Uses visible wavelength split into colors. Doppler shift. Wavelengths change when object is moving. Red/ . Blue. Shift. RECEDING (moving away) objects show a INCREASE in WAVELENGTH- red shift. . Size does matter. The bigger, the better. 2. Resolve detail. 3. Magnification. Only important for solar system objects. Refracting Telescopes. Cheap. Good for bright objects. Basic design. Reflecting Telescopes. EEE Project. E. . Bossini. , C. Cicalò, . D. De . Gruttola,. I. . Gnesi. , M. Garbini, S. . Grazzi. , M.P. . Panetta. EEE meeting. 22. /03/. 2017. beta . ditributions. . for . all. . telescopes. .