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 > Star Clusters & Nebulae > Dark Nebulae

Learn Astrology

Back to Star Clusters & Nebulae   |   Back to Astrophysical Direction 

Dark Nebulae

If there are no stars in or near the nebulosity, the nebula will obscure or block all light beyond or behind itself. The result are dark patches or 'holes' in the sky. The most celebrated dark nebua is the Coal Sack in the Southern Cross.

Dark Nebulae


Dark Clouds and Interstellar Dust

Until the 20th century, astronomers assumed that the immense distance between stars was empty, in effect a perfect vacuum. Numerous dark patches were thought to be some sort of 'holes in space" where there were no stars. A few of these dark areas are visible to the naked eye, in particular the "Coal Sack" near the Southern Cross and the "Great Rift" in the Milky Way. The Great Rift splits the luminous background from Cygnus to Sagittarius through a succession of large overlapping dark clouds in the equatorial plane of the galaxy. It has been discovered that these "holes in the stars" are in fact obscuring clouds of small grains of matter, dust. Like cigarette smoke, this dust diffuses the light coming from behind them. There is no essential difference between a bright nebula and a dark one; it all depends on whether there are any suitable stars to provide illumination.

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