MENU
Detailed Menu
COPYRIGHT
PUBLICATION
DRAWINGS
ARTICLES
ARCHIVES
OBSERVERS
HISTORY
LINKS
WEB MASTER
IN FRENCH

© Ciel Extrême, 1998
Detailed Menu
to be rolled down
 

You can consult the .webmaster page for more info...

 

© copyright/authors rights = how to use the material exposed on this site with full honesty


!!! new !!!
MAGNITUDE LIMITS ON POLARIS
Some rejuvenated data to allow for better rating estimates of night sky transparency with the naked eye: a selected Polaris area with visual magnitudes from Tycho/Hipparchos data (charts by Guide7).

DRAWING THE DEEP SKY
No need to bear Picasso's name to use a pencil in order to draw the deep sky ! You can learn the bases and find tricks to record cheaply your deep sky observations... 

VIRTUAL APERTURE
For the same diameter, which instrument to choose ? A Schmidt-Cassegrain, a refractor, a classical Newton or why not a Maksutov ? In this article, you will find a way to compare performances of all instruments destined to deep sky observing. 


NEWTONIAN COLLIMATION
You never obtain sharp images and don't know how to check your instrument collimation. Here are the detailed explanation of optical checkings and adjustments (collimation) that you can apply to your Newtonian, whatever its aperture.

OBSERVERS AND INSTRUMENTS
Visit the "observatories" of some french deep sky amateurs thanks to these pages... Diameters comprised between 15 and 76cm !

SCANNED DRAWINGS
In this "portofolio", you can see a dozen drawings, all aesthetical objects sometimes not very well known...

LINKS
Surf on Ciel Extrême's favourite sites related to the deep sky.

ARCHIVES "SKY DEPTHS"
Discover some column articles dealing with the deep sky, published in "Astro-Ciel" (french amateur astronomy magazine now out of print)... 

HISTORICAL BIOGRAPHIES
A list of personnalities (with shorts biographical facts) related to deep sky history ... 

back to head-menu