Matrix Software Home
Your Shopping Cart  |          
Matrix Software Home
Professional
Software
Blue*Star Pro
Web Service
Win*Star V6.0
NEW Sirius 2.0
NEW Kepler 8.0
Forecasts
Astro*Search
Calendars
Report Pro.
Personal
Software
Blue*Star
Win*Star Express
NEW Pegasus
Biorhythms
KNOW Series
Tarot Personal
Report Personal
Reportes Espaņol
Starter Pack
Report Writers
Software
Jupiter Report
Togetherness
Time Together
Birthday
Astro*Talk
Relationships
Forecasting
Solar Return
Lunar Return
Midpoint Keys
Make Money
Home Business
Pro Package
Home Business


Books
Paperbacks
FREE E-Books
Single Reports
Personal Readings
Natal Report
Forecast
Relocation
Child Report
Timeline
Just for Women
Solar Return
Relationship
Past Lives
Solar Arc
Free Oracle
The Matrix Oracle
Tarot
Natal Astrology
Relationships
Runes
Fortune Cookie
Electric Almanac
Numerology
I-Ching
Yes/No Oracle
Word Oracle
Community
Press to view all ^
Astrology Blogs
Interviews
Ask Astrology
Astro Dialogues
Find an Astrologer
Astro Links
Book Reviews
Articles
Celebrity Search
Astro*Talk Bulletin
Free Stuff
Fun Things to Do
NEW Sky Reader
Celebrity Search
Free Desktops
Learn Astrology
Astro Links
Monthly Planets
Today's Chart
Registered User
Matrix Customers
Quick Fixes


On Sale Now
Matrix Software List
Cosmic Patterns Software List

Matrix Astrology Software

  Beginning Astrology                  
  Your Sun Sign                           
  Astrology Articles                     
  Astrology Book Reviews          
  Astro Outline                             
  Visual Astrology                      
    Astrophysical Directions
  Astrology Organizations           


 
Matrix Software > Learng Astrology > Astrophysical Directions > Galactic Objects > Hertzsprung-Russell Diag.

Learn Astrology

Back to Galactic Objects   |   Back to Astrophysical Direction 

Hertzsprung-Russell Diagram

The Hertzsprung-Russell diagram is said to be the most important in all astronomy. It is a graph obtained by plotting the luminosities versus the temperatures of stars. As shown in the diagram, the luminosities are measured along the vertical axis and the surface temperature or spectral type along the horizontal axis. Every star for which the luminosity and temperature are known can be represented in this graph. Notice that the stars are not scattered in a random fashion over the diagram, but are grouped in three main regions.

The Life Story of our Sun

This tells us that there is a precise relationship between the temperature and luminosity of stars. Most stars are located along the main sequence that runs diagonally from the hot & bright stars in the upper left to the cool & dim stars in the lower right. Our Sun is near the middle of the main sequence. There is a second major grouping of stars in the upper right-hand corner of the diagram. These stars are bright & cool and called red giants. Betelgeuse, Antares, and Aldebaran are red giants. A third group of stars, white-dwarfs, can be found in the lower left-hand corner, These stars are hot and dim.

Stellar Evolution on the Hertzsprung-Russell diagram

Copyright (c) 1997-99 Michael Erlewine


Home  |  Software  |  Learn Astrology  |  Free Stuff  |  Privacy Policy  |  Security   |  About Us   |  Contact Us   |  Site Map  |  F.A.Q.

Matrix SoftwareMatrix Software License Agreement