Warm Up 1)What does a prism do? a.separates sunlight into ultraviolet and infrared radiation b.separates visible light into several colors c.changes the.

Slides:



Advertisements
Similar presentations
Earth Science 24.2 : Tools for Studying Space
Advertisements

Optics and Telescopes Chapter Six. Telescopes The fundamental purpose of any telescope is to gather more light than the naked eye can In many cases telescopes.
24.1 The Study of Light.
Chapter 24: Studying the Sun (and other stars)
Light and Telescopes Please pick up your assigned transmitter
Honors Ch Pg Almost everything we know about the universe (space) comes by studying light from distant sources. Light from what?
Astronomy 101 Section 020 Lecture 6 Optics and Telescopes John T. McGraw, Professor Laurel Ladwig, Planetarium Manager.
Telescopes (Chapter 6). Based on Chapter 6 This material will be useful for understanding Chapters 7 and 10 on “Our planetary system” and “Jovian planet.
Optics and Telescopes Chapter Six.
Telescopes.
Telescopes. Optical Telescopes Ground based and on satellites Observations are recorded using a camera instead of the human eye most times. – This is.
Telescopes & Light. The Powers of a Telescope Light Gathering Power Light Gathering Power : Astronomers prefer *large* telescopes. A large telescope can.
Telescopes Section 15.1.
Space Technology Telescopes Chapter 18 Section 2.
Chapter 2 Decoding the Hidden Messages in Starlight
Telescopes & Light: Part 1. A Telescopes is a tool used to gather light from objects in the universe.
How do Astronomers know what they know? Almost everything we know about Astronomy was learned by gathering and studying light from distant sources Properties.
Chapter 3 Light and Telescopes. What do you think? What is the main purpose of a telescope? Why do stars twinkle?
Prentice Hall EARTH SCIENCE
Light and Telescopes.
Light and Telescopes.
Day 17 September 18, Agenda HWQ 5 Section 1 Notes (3 rd ) Evolution of Stars Concept Map Evolution Poster.
Telescopes What is the purpose of a telescope? What is the purpose of a telescope? To gather electromagnetic radiation in the form of visible light. It.
Astronomy and the Electromagnetic Spectrum
Chapter 24 Studying the Sun Who is Stan Hatfield and Ken Pinzke.
8.4 Light & Telescopes. Do Now! 1.What is the difference between apparent magnitude and absolute magnitude? 2.What two characteristics of stars does a.
Chapter 18.2 Telescopes.
Telescopes  Device used to collect Light and to Magnify Distant Objects  Plans made by Rodger Bacon 13 th Century  Galileo improved the Device.
Tools of Astronomy.
Tools and Technology Space Objects By: Brittany D. Alexander.
Lecture Outlines Astronomy Today 7th Edition Chaisson/McMillan © 2011 Pearson Education, Inc. Chapter 5.
Prentice Hall EARTH SCIENCE
Telescopes What is the purpose of a telescope? What is the purpose of a telescope? To gather electromagnetic radiation in the form of visible light. It.
Chapter 21: Stars, Galaxies, Universe Section 1: telescopes
Chapter 24 Sec. 1 Light Sec. 2: Tools of Astronomy
Universe Tenth Edition Chapter 6 Optics and Telescopes Roger Freedman Robert Geller William Kaufmann III.
Chapter 26 ~ Stars and Galaxies Section 1 ~ Constellations.
EARTH SCIENCE Prentice Hall EARTH SCIENCE Tarbuck Lutgens 
Refracting Telescopes 24.2 Tools for Studying Space  A refracting telescope is a telescope that uses a lens to bend or refract light.  Focus The most.
The Earth and the Universe Light, Astronomical Observations, and the Sun.
Stellar Properties. A. Optical Telescopes a.Three properties that aid astronomers: i. LIGHT GATHERING POWER - ability to intercept more light, producing.
Space Tools Key Point (Std ): Compare the purposes of the tools and the technology that scientists use to study space.
Warmup How would you explain the concepts of a year, a month, and a day to a small child?
Before, you learned Objects in the universe are grouped together in different ways The motions of planets and other nearby objects are visible from Earth.
 Electromagnetic Radiation › Gamma rays, X-rays, UV light, visible light, infrared radiation, microwaves, and radio waves › All energy travels through.
Telescopes & Light. History Hans Lippershey Middleburg, Holland –invented the refractor telescope in 1608 Galileo –the first to use a telescope in astronomy.
Space Tools Standard Compare the purposes of the tools & the technology that scientists use to study space.
Telescopes What is the purpose of a telescope?
Homework #4 What is the maximum resolution of your eyes (assume the wavelength range that your eyes are sensitive to is 300 – 700 nm and that your iris.
Studying the Sun Mama always told me not to look
The Tools of the Astronomer
Space Tools 4.10 Here is a satellite image of the east coast of the United States at night. This is a satellite image because the space technology is.
Lesson 1 Observing the Universe
Ch.1, Sec.2 - Telescopes Optical Telescopes
24.2 – Tools for Studying Space
Telescopes & Light.
TELESCOPES What is the purpose of a telescope?
Tools for Studying Space
Telescopes and the Electromagnetic Spectrum Section 3
Prentice Hall EARTH SCIENCE
The Study of Light Picture taken
21 The Study of Light Electromagnetic Radiation
Light and Telescopes.
Earth Science Ch. 24 The Sun.
Telescopes What is the purpose of a telescope?
Studying the Sun Telescopes Chapter 24
Chapter 18 Section 2 Telescopes Bellringer
Review When is Orion visible in Arizona?
Unit 3 Practice Test Answer KEY
Telescopes.
Presentation transcript:

Warm Up 1)What does a prism do? a.separates sunlight into ultraviolet and infrared radiation b.separates visible light into several colors c.changes the wavelength of electromagnetic waves d.combines the colors of visible light into white light 2)What will happen to an object’s wavelength as the object moves toward you? a.The wavelength will vary. b.The wavelength will be shortened. c.The wavelength will not change. d.The wavelength will be lengthened. 3)Large Doppler shifts indicate ____. a.high speedsc. low speeds b.low temperaturesd. high temperatures Answers: 1) b. 2) b. 3) a.

Tools for Studying Space Chapter 24, Section 2

Refracting Telescopes Refracting Telescope – a telescope that uses a lens to bend and concentrate the light from distant objects The most important lens in a refracting telescope, the objective lens, produces an image by bending light from a distant object so that the light converges at an area called the focus For an object such as a star, the image appears as a point of light; for nearby objects, it appears as an inverted replica of the original Astronomers usually study an image from a telescope by first photographing the image Chromatic Aberration – the property of a lens whereby light of different colors is focused at different places

Simple Refracting Telescope

Concept Check What is chromatic aberration? Chromatic aberration is an effect associated with refracting telescopes that weakens an image and produces a halo of color around it.

Reflecting Telescopes Reflecting Telescope – a telescope that concentrates light from distant objects by using a concave mirror Because the focus of a reflecting telescope is in front of the mirror, an observer must be able to view the image without blocking too much incoming light Most large optical telescopes are reflectors; light does not pass through a mirror so the glass for a reflecting telescope does not have to be of optical quality Both refracting and reflecting telescopes have three properties that aid astronomers in their work: 1) light- gathering power, 2) resolving power, and 3) magnifying power Another advantage of telescopes with large objectives is their great resolving power, which allows for sharper images and finer detail To find the magnification, divide the focal length of the objective by the focal length of the eyepiece

Viewing Methods with Reflecting Telescopes

Concept Check What is light-gathering power? Light-gathering power refers to the telescope’s ability to intercept more light from distant objects, thereby producing brighter images.

Detecting Invisible Radiation A narrow band of radio waves is able to penetrate the atmosphere, by measuring these waves we can map the galactic distribution of hydrogen Radio Telescope – a telescope designed to make observations in radio wavelengths A radio telescope focuses the incoming radio waves on an antenna, which absorbs and transmits these waves to an amplifier, just like a radio antenna Large dishes are necessary to intercept an adequate signal from celestial sources Radio telescopes are less affected by turbulence in the atmosphere, clouds, and the weather; viewing is possible 24 hours a day; they can “see” through interstellar dust clouds that obscure visible wavelengths Radio telescopes have revealed spectacular events (the collision of two galaxies!)

Radio Telescopes

Concept Check Why can radio telescopes be used 24 hours a day? They do not need visible light to obtain images.

Space Telescopes Space telescopes orbit above Earth’s atmosphere and thus produce clearer images than Earth- based telescopes The first space telescope, built by NASA, was the Hubble Space Telescope (put into orbit in 1990) Hubble and other telescopes have detected more than 140 extrasolar planets (a planet orbit around a star other than the sun) A planet’s gravity causes a Doppler shift in light emitted by the planet’s star Space telescopes are designed often to observe objects in space at wavelengths outside the visible spectrum; this allows astronomers to classify objects and to study how they formed

Hubble Space Telescope

James Webb and Kepler Telescopes James Webb – looking for the first galaxies (infrared) Scheduled Launch: 2014 Kepler – looking for Earth-size planets (visible light) Launched May 2009 As of today…5 planets found (larger than Earth)

Assignment Read Chapter 24, Section 2 (pg ) Do Chapter 24 Assessment #1-34 For Section 2: #’s 4-6, 16-19, 25, 33