The Milky Way in visible light

Slides:

Advertisements

Similar presentations

Star Properties!!.

Advertisements

The Hertzsprung – Russell Diagram

A Comparison of the Nearest and Brightest Stars The nearest stars to the Sun are thought to represent the true distribution of stars in the disk of the.

Astronomical Distances Distances in astronomy are huge The Moon is 240,000 miles away The Sun is 93, 000,000 miles away Neptune is 2,810,687,500 miles.

Measuring the Stars (Part III). The “Cosmic Distance Ladder”

Spectrum of Sun. stellar spectra The Hertzsprung- Russel diagram a.k.a. HR diagram Vertical axis: L * Horiz. axis: T s * color of the star.

stellar spectra The Hertzsprung- Russel diagram a.k.a. HR diagram Vertical axis: L * Horiz. axis: T s * color of the star.

TYPES OF GALAXIES. Edwin Hubble Early 1900’s: astronomers determined that galaxies appear in a low number of shapes Hubble (1920s): developed a classification.

Chapter 24 Normal and Active Galaxies. The light we receive tonight from the most distant galaxies was emitted long before Earth existed.

Part 5: The Galaxy and the Universe In this final part of the course, we will: 1. Look at the big spatial picture: Are there organizations of stars? What.

Unit 11, Chapter 32 Integrated Science. Unit Eleven: Astronomy 32.1 Stars 32.2 Galaxies and the Universe Chapter 32 The Universe.

Evolution of Stars.

Hertzsprung-Russell Diagrams

The Nature of Galaxies Chapter 17. Other Galaxies External to Milky Way –established by Edwin Hubble –used Cepheid variables to measure distance M31 (Andromeda.

Stars!!!! Galaxies and the Universe too!. Stars are far away! The closest star to Earth is the sun. The next closest is Proxima Centauri If you can travel.

Galactic Nucleus. Mass of the Galaxy The orbit of clusters can be used to estimate the mass of the galaxy. –Same used for planets and binary stars The.

Our Place in Space Where we are 1. We live on Earth 2 Welcome to Earf!

Lecture Outlines Astronomy Today 7th Edition Chaisson/McMillan © 2011 Pearson Education, Inc. Chapter 23.

Introduction to Galaxies 5/23/2013. BR: Milky Way Scale The Milky Way has a diameter of approximately 8.25 x 10 9 AU (8.25 billion AU). 206,265 AU = 3.26.

CEPHEIDS. What are Cepheids? Stars that “pulse” and change luminosity Very bright (100,000x luminosity of Sun) Used to measure extreme distances in space.

Chapter 27 Stars and Galaxies Section 1 Characteristics of Stars Notes 27-2.

“Globular” Clusters: M15: A globular cluster containing about 1 million (old) stars. distance = 10,000 pc radius  25 pc “turn-off age”  12 billion years.

Outer Space Jeopardy! Celestial Objects Gravity Distance in Space Galaxies It’s a Mixed Bag $100 $200 $300 $400 $500 FINAL JEOPARDY Refresh.

Astronomy Contents of the universe We live in the solar system. Earth orbits the sun every yr in elliptical orbit. Distance Earth to sun 1 AU.

News flash ALMA observes a protoplanetary disk around the young star HL Tauri. This is the first time we can DIRECTLY actually observe a planetary system.

Galaxies and Stars.

How fast would a galaxy 2,000 megaparsecs away be moving with respect to us, according to Hubble’s Law? Hint: H0 = 70 km/s/Mpc 1,400 km/s 14,000 km/s 140,000.

8.8 A and B Components the Universe and the Sun

© 2017 Pearson Education, Inc.

Chapter 12 The Universe Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

The Milky Way Our Galactic Home.

Beyond Our Solar System – The Universe in a Nutshell!

The Birth, Life, and Death of Stars

Topic F Notes Use Cornell note format.

Objectives Describe how astronomers classify galaxies.

HUBBLE DEEP FIELD:.

Properties of stars 25.1.

Characteristics of Stars

Bellwork 11/10 Please turn in your bellwork sheet from last week

Unit E – Space Exploration The Distribution of Matter in Space

9. Distances in open space

Hertzsprung-Russell Diagram

The Hertzsprung-Russell Diagram

Chapter 14 Spiral Galaxy.

Galaxies! Out of this World.

Unit 11- Characteristics of the Universe

The Hertzsprung-Russell Diagram

Integrated Science.

Chapter 20 Galaxies Determining Distance

Galaxies Chapter 16.

Announcements Observing for third exam starts today.

Galaxies How big is the Universe? Types of galaxies Groups of galaxies

But first dwarf and other special galaxies

Jeopardy Final Jeopardy Universe Milky Way Sun Earth $100 $100 $100

Astronomy Mr. Thompson THE MILKY WAY Galaxy.

Other Galaxies: Hubble supersedes Shapley

Cosmic Dist. Ladder: Why Is it a Ladder?

Giant Elliptical Galaxies

Environmental Science

Galaxies Galaxy Spiral Elliptical Irregular Milky Way Local Group.

Structure, Types, Known Galaxies

Presentation transcript:

The Milky Way in visible light

near-IR (2Mass) 1500 LY

near-IR (2Mass) 1500 LY elliptical stellar orbits in central arcsecond

Active Galactic Nuclei

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

The Hertzsprung-Russel diagram a.k.a. HR diagram Vertical axis: L* Horiz. axis: Ts*

A main sequence G2 star, like the Sun, makes a good standard candle Certain types of giant stars, especially the so-called Cepheid variables, are also used as standard candles

Edwin Hubble found Cephieds in Andromeda galaxy - 1923

Another type of standard candle ; type 1a supernovae

Except for the closest few galaxies, they are all moving away from us (fast!)