WARM UP 2-27-141. What is the definition of

astronomy ?

2. How do we study space?

3. What do you know about space?

WARM UP 2-28-141. What is the big bang theory? (the

scientific theory, not the show, smarty pants) ;)

2. What is a light year?

WARM UP 3-3-141. Describe the 3 different types of

telescopes

2. What is the electromagnetic spectrum?

CHAPTER 26-1STUDYING SPACE NOTES

1. Introduction to astronomy2. Electromagnetic spectrum 3. Types of telescopes

ASTRONOMY

Astronomy: the scientific study of the universe

OBSERVING SPACE THROUGH ELECTROMAGNETIC ENERGY

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

ELECTROMAGNETIC SPECTRUM

TOOLS OF ASTRONOMY

Telescopes collect and focus light,

Telescopes can: Magnify - make objects

appear larger Resolve - to see fine

detail Gather Light - make faint

objects look brighter

TOOLS OF ASTRONOMY

Refracting telescopes use lenses to focus light

YerkesObservatory, University of Chicago

Largest refractingtelescope with aone meter lens

TOOLS OF ASTRONOMY

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)

TOOLS OF ASTRONOMY 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

ASTRONOMICAL “SEEING”

Looking through air causes stars to twinkle and planetary detail to blur

Bad “seeing

” on this side

Good “seeing”on this side

TOOLS OF ASTRONOMY

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

TOOLS OF ASTRONOMY

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

TOOLS OF ASTRONOMY

Space Probes:make close-up observations and obtain samples

Shuttles: Human Spaceflight - Apollo moon missions, International Space Station

ASSIGNMENTS

Notes Summary

Turn in notebooks

Telescope activity onlinehttp://www.telescope-simulator.com/