HR Diagram.

Slides:



Advertisements
Similar presentations
Chapter 11: Characterizing Stars
Advertisements

THE LIFE CYCLE OF STARS Chapter 15 – 2 Part 2. A Tool for Studying Stars A Danish astronomer, Ejnar Hertzsprung, and American astronomer, Henry Russel,
February 2, 2012 In our study of Stars The students will be able to
Announcements Observing on the roof of Van Allen Hall has started and will run Tuesday to Thursday from 9-11 pm this week. The first hour exam will be.
Looking for patterns If we plot a graph of luminosity against temperature for lots of stars we get a graph like this…
Hertzsprung-Russell Diagrams. What is a star? A cloud of gas, mainly hydrogen and helium The core is so hot and dense that nuclear fusion can occur. The.
How Do Astronomers Measure the Brightness of a Star?  Stars vary greatly in brightness  Early peoples observed bright stars and grouped them into constellations.
UNIT NINE: Matter and Motion in the Universe  Chapter 26 The Solar System  Chapter 27 Stars  Chapter 28 Exploring the Universe.
TODAY’S VOCABULARY STAR MAGNITUDE: A term used to describe the brightness of a star.
HR Diagram. Characteristics of Stars  Temperature/Color  Mass  Luminosity Absolute Magnitude Apparent Magnitude.
The Life Cycle of Stars “protostar” The Life Cycle of Stars “protostar” “Main Sequence” (longest phase in a star’s cycle.
 Stars can be classified in three ways:  Size – How massive the star is  Temperature – A stars color reveals its temperature. ▪ Red stars have a cooler.
Characteristics of Stars
Classification of Stars – HR diagram Objectives: understand the differences between near and bright visible stars learn how to use the HR-diagram to classify.
Chapter 10 The Nature of Stars. What do you think? What color are stars? Are most stars isolated from other stars, like the Sun?
Unit 2: Lesson 5- Classifying stars SWBAT: Plot and analyze stars according to their temperature and luminosity. WOD: main sequence star- hot luminous.
Characteristics of Stars. Stars… Are hot balls of plasma that shine because nuclear fusion is happening at their cores… they create their own light Have.
Heat Brightness cooler hotter brightest darkest Each star is represented by a dot. The position of the dot tells us two things about the star: its.
© 2011 Pearson Education, Inc. Chapter 17 Measuring the Stars.
Classifying Stars.
The Hertzsprung-Russell Diagram. What is the HR Diagram? Tool that shows relationships and differences between stars. Relative measure of luminosity &
Chapter 27 Stars and Galaxies The Universe is immense.
The Life Cycle of Stars.
Stars.
Stars.
Characteristics of Stars
The Hertzsprung-Russell Diagram (a.k.a. H-R Diagram)
H-R Diagrams.
Questions 1 – 24: Due Wednesday, February 29, 5:00 pm.
Stars.
Stars.
Star Classes Los Cumbres Observatory.
The Hertzsprung-Russell diagram and the nature of stars
NOTES: Star Chemistry and Measurement
How light from the stars can tell us (almost) everything about them!
H-R Diagrams.
H-R Diagrams.
Stars.
Hertzsprung-Russell Diagram
THE LIFE CYCLE OF STARS Chapter 15 – 2 Part 2.
Hertzsprung-Russell Diagram
H-R Diagrams.
Star Chemistry and Measurement
The Hertzsprung-Russell Diagram
Hertzsprung - Russell Diagram
Classifying Stars Stars are classified by 3 Main Characteristics:
The Hertzsprung-Russell Diagram
I can define luminosity
H-R Diagrams.
Hertzsprung-Russell Diagrams
H-R Diagram.
The Hertzsprung-Russell Diagram (a.k.a. H-R Diagram)
Stars.
THE LIFE CYCLE OF STARS Chapter 15 – 2 Part 2.
Learning Goals: 4. Complex Knowledge: demonstrations of learning that go aboveand above and beyond what was explicitly taught. 3. Knowledge: meeting.
Stars Astronomy Notes Page 5 ©Mark Place,
Stars Astronomy Notes Page 5 ©Mark Place,
“Beyond the solar system where no man
Stars.
The Hertzsprung-Russell Diagram
To help understand the HR Diagram 
Group Project 1 is due on Friday; Only 1 paper per group
Classifying Stars – the Hertzsprung-Russell Diagram
The HR diagram.
Environmental Science
Stars.
Stars.
Stars.
The Hertzsprung-Russell Diagram (a.k.a. H-R Diagram)
H-R Diagrams.
Presentation transcript:

HR Diagram

Some STAR characteristics are: Magnitude: How bright a star ranks on a numerical scale ( - is bright, + is dim) Luminosity: Energy output of a star in Watts (just like a lightbulb)

SPECTRAL CLASS: Categories of age, color, and temperature Spectral Class categories: O, B, A, F, G, K, M [Oh Be A Fine Girl, and Kiss Me ]

The Hertzsprung-Russell Diagram is a scatter plot that is 4-directional: it tells you the spectral class, magnitude, power, and temperature of a star.

Is a Red Supergiant or a White Dwarf brighter?

Is a Blue Dwarf or a White Dwarf hotter?

Is a reddish main sequence star or the sun younger?

Does a Red Giant or a Blue Giant generate more power from fusion?

What spectral class does White Dwarf stars belong to?

Describe 3 pieces of information about the sun from this diagram:

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.