01-March-2006, 10:05 AM
|
 |
Senior Member
|
|
Join Date: Sep 2003
Location: Dubh Linn
Posts: 3,620
|
|
To what is Robert Burnham Jr. referring in the following passage:
Quote:
|
A peculiar feature of [...] is an apparently illusionary color contrast described by various observers. T. W. Webb calls them "greenish white and blue" but then adds "I found contrast certain, but fainter stars troublesome as to color, usually ruddy or tawny, sometimes blue". In 1855 he thought them "pale yellow and brown yellow" and on other occasions "pale yellow and fawn-colored". K. McKready in his Beginner's Star Book (1912) calls the components "pale green and blue", while C. E. Barns (1929) simply notes "weird coloring" and, perhaps wisely, refuses to commit himself to any more definite statement.
|
__________________
- Learn a lot teaching others.
|