1. What is the definition of astronomy ? 2. How do we study space? 3. What do you know about space?

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Presentation transcript:

1. What is the definition of astronomy ? 2. How do we study space? 3. What do you know about space?

1. What is the big bang theory? (the scientific theory, not the show, smarty pants) ;) 2. What is a light year?

1. Describe the 3 different types of telescopes 2. What is the electromagnetic spectrum?

1. Introduction to astronomy 2. Electromagnetic spectrum 3. Types of telescopes

 Astronomy: the scientific study of the universe

 The Electromagnetic spectrum is an arrangement of energy waves based on their wavelength.

 Telescopes collect and focus light,  Telescopes can:  Magnify - make objects appear larger  Resolve - to see fine detail  Gather Light - make faint objects look brighter

 Refracting telescopes use lenses to focus light

Yerkes Observatory, University of Chicago Largest refracting telescope with a one meter lens

 Reflecting telescopes use mirrors to focus light

Palomar Observatory monitored by Cal Tech Largest Reflecting telescope is at Gran Telescopio Canarias (Canary Islands, Spain – 34.1 feet aperture)

 Radio telescopes detect radio waves  Focuses the waves on an antenna, which absorbs and sends these waves to an amplifier, just like a radio antenna

Looking through air causes stars to twinkle and planetary detail to blur Bad “seeing” on this side Good “seeing” on this side

 Best place for telescopes is in space! Hubble Space Telescope!!

 Telescopes in space allow:  Perfect seeing (no blurred images)  The ability to see wavelengths of light (such as IR, UV, X rays, & gamma rays) blocked by the earth’s atmosphere

 Space Probes:make close-up observations and obtain samples  Shuttles: Human Spaceflight - Apollo moon missions, International Space Station

 Notes Summary  Turn in notebooks  Telescope activity online