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.

Slides:

Advertisements

Similar presentations

24.1 The Study of Light.

Advertisements

Unit 11, Section 1.  Light can take millions of years to travel to Earth  All electromagnetic radiation travels at the speed of light, which is 300,000.

Chapter 24: Studying the Sun (and other stars)

© 2011 Pearson Education, Inc. Lecture Outlines Astronomy Today 7th Edition Chaisson/McMillan © 2011 Pearson Education, Inc. Chapter 5.

Telescopes. Act as “electromagnetic radiation catchers” Capture as much as possible Focus Magnifies images Telescopes that “catch” visible light are called.

Telescopes and Spacecraft Astronomy 311 Professor Lee Carkner Lecture 7.

Studying Space Chapter 26 Notes Standards 2b Students know galaxies are made of billions of stars and comprise most of the visible mass in the universe.

Telescopes Section 15.1.

Space Technology Telescopes Chapter 18 Section 2.

How do Astronomers know what they know? Almost everything we know about Astronomy was learned by gathering and studying light from distant sources Properties.

Telescopes. Act as “electromagnetic radiation catchers” Capture as much as possible Focus Magnifies images Telescopes that “catch” visible light are called.

Astronomy Radiation from Space. Electromagnetic spectrum Radiation – energy that is transmitted from one place to another by waves. - it has both magnetic.

THE SUN-EARTH-MOON SYSTEM Chapter 28. The best tool to study the universe is the light emitted from it – Radiation We study Electromagnetic Radiation.

Compare refracting and reflecting telescopes. Have you ever bent or slowed down light? How?

Astronomy and the Electromagnetic Spectrum

SPACE SYSTEMS UNIT Chapters 26 & 30.

Chapter 18 – Studying Space Astronomy – The study of space, stars the visible universe. Year – The amount of time required for the Earth to orbit the sun.

Optics and Telescopes. Optics and Telescopes: Guiding Questions 1.How do reflecting and refracting telescopes work? 2.Why is it important that professional.

Tools for Studying Space. © 2011 Pearson Education, Inc. Telescopes.

Ch. 28 Sec. 1 Tools of Astronomy. Tools  Radiation  Light is the best tool used to observe and learn about the universe  Before telescopes, scientist.

Telescopes Science 9. Telescopes The main purpose of a telescope is to gather light Images that form can be recorded by taking a picture or a video.

LT 3: I can compare refracting and reflecting telescopes.

Tools of Astronomy.

Tools of Modern Astronomy Chapter 21 Section 1 Pages Chapter 21 Section 1 Pages

Tools and Technology Space Objects By: Brittany D. Alexander.

Key Ideas Describe characteristics of the universe in terms of time, distance, and organization. Identify the visible and nonvisible parts of the electromagnetic.

Lecture Outlines Astronomy Today 7th Edition Chaisson/McMillan © 2011 Pearson Education, Inc. Chapter 5.

SPACE A star (our sun )is part of a galaxy. A planet (earth) orbits a star. A moon (our moon) orbits a planet (earth)

Astronomy Chapter Nineteen: Galaxies and the Universe 19.1 Tools of Astronomers 19.2 Stars 19.3 Galaxies and the Universe.

The Tools of Astronomy How astronomers study space.

Telescopes Key Words Optical Telescopes: make use of electromagnetic radiation in the range of visible light Refraction Telescopes: use lenses Reflecting.

Astronomy Astronomy the scientific study of the universe Scientists who study the universe are called astronomers Early Astronomers includes: Nicolaus.

TELESCOPE TOUR. Radio and visible waves can go through Earth’s atmosphere.

Chapter 5 Telescopes Chapter 5 opener. This composite photograph shows two of the premier optical telescopes available to astronomers today. At the top,

TELESCOPES. Where do we put telescopes to have the best viewing conditions? 1. On Earth: CLEARHIGHDRYCOLDDARK.

Chapter 21: Stars, Galaxies, Universe Section 1: telescopes

Add to table of contents:  Pictures of telescopesPg. 82  TelescopesPg. 83.

Chapter 24 Sec. 1 Light Sec. 2: Tools of Astronomy

Tools of Astronomy Chapter 28.1 Pages The Best Tool The Light that comes to earth from distant objects is the best tool that astronomers can.

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.

Add to table of contents:  Pictures of telescopesPg. 82  TelescopesPg. 83.

Space Tools Key Point (Std ): Compare the purposes of the tools and the technology that scientists use to study space.

From the Greek:tele = 'far' and skopein = 'to look or see'; teleskopos = 'far-seeing'

 Pictures of telescopesPg. 96  TelescopesPg. 97.

 Electromagnetic Radiation › Gamma rays, X-rays, UV light, visible light, infrared radiation, microwaves, and radio waves › All energy travels through.

Telescope Technology Types of Telescopes Hubble Telescope and NASA’s Great Observatories.

Telescopes & Light. History Hans Lippershey Middleburg, Holland –invented the refractor telescope in 1608 Galileo –the first to use a telescope in astronomy.

TELESCOPES ALLOW US TO STUDY SPACE FROM EARTH!!!

The Tools of the Astronomer

Lesson 1 Observing the Universe

Ch.1, Sec.2 - Telescopes Optical Telescopes

TELESCOPES ALLOW US TO STUDY SPACE FROM EARTH!!!

Tools of Astronomy.

Tools for Studying Space

Space Technology 8.E.4B.5 Obtain and communicate information to describe how data from technologies (including telescopes, spectroscopes, satellites,

Telescopes and the Electromagnetic Spectrum Section 3

Tools of Astronomy.

Tools of Astronomy.

Space Technology 8.E.4B.5 Obtain and communicate information to describe how data from technologies (including telescopes, spectroscopes, satellites,

Section 1.2 Telescopes allow us to study space from earth

Studying the Sun Telescopes Chapter 24

Telescopes 4/23/15 IN: What is a telescope? How is it used?

Unit 3 Practice Test Answer KEY

Unit 3, Section 1 Telescopes.

How astronomers study space

Tools and Technology of Space

How Stars are Seen… Astronomy - Ch.20.

Presentation transcript:

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

Radiation Electromagnetic radiation travels at the same speed and is classified by: Tools of Astronomy Wavelength (λ)- distance between 2 peaks Frequency (f)- # of waves occurring per second

Wave basics

Propagation of Light As you move away from a light source the light gets dimmer. How much … depends on the Inverse Square Law If we stand twice as far from a light we ¼ or 4x less light; and the light covers 4x the area. Same light covers more area

Refraction vs. Reflection Refraction Bending of light Reflection Bounce back of light

Telescopes Tools of Astronomy

Convex Lens Concave Lens

Telescopes: Refractors Astronomers use two main types of telescopes to gather and study visible light: refractors and reflectors REFRACTORS Use at least two convex lenses to magnify an image – Reflectors make up the majority of telescopes that are in use today. – Most major observatories are located in remote, high elevation locations in order to minimize light and atmospheric interference.

Telescopes: Reflectors Use large convex mirrors to magnify an image Most telescopes are reflectors

Telescopes Objective lens or mirror gathers light Eyepiece lens magnifies image Light gathering power of the lens is related to the size of the lens A = π r 2 Double the radius and light gathering power increases 4x Lense or Mirror Radius Light- gathering power 11 pi 24 pi 416 pi 864 pi pi

Most major observatories are located in remote, high elevation locations in order to minimize light and atmospheric interference

Radio Telescopes Used to study radio waves (not visible light) Use the same principle as radar Can be very large Satellite dishes are kind of like a radio telescope Very Large Array in New Mexico

Hubble Space Telescope Located outside of Earth’s atmosphere (about 350 miles or 589 Km above surface), so it can “see” more Orbits Earth once every 97 minutes Can detect UV, visible and infrared forms of EMR Solar-powered

Chandra X-Ray Observatory Unmanned satellite launched in 1999 Located outside of Earth’s atmosphere Studies X-ray emissions from supernovas, black holes, neutron stars, etc. Sagittarius A- supermassive black hole at center of Milky Way

James Webb Telescope Successor to Hubble Will observe infrared light from faint and very distant objects Will be much further away from Earth (about 1.5 million km) than Hubble Launch during Oct 2018?