Sky,
telescopes,
comets etc.
...
(first,
adjust
your screen here!)
Please
note: All pictures on these pages are ©
Luc
Arnold 1989-2004 and
should
not be reproduced without my permission.
-
Comet
Ikeya-Zhang C/2002 C1 photographied from OHP (March 2002)
-
Sunset
in the Pacific Ocean, seen from ESO Paranal Observatory
(January 2002)
-
Results
from 9 nights in the Alps, mid-September 2001 (M42
etc.)
-
A Sun
pilar observed at dusk, from the OHP 193cm telescope dome
(November
1999)
-
Results from the 9-10 October 1999 run in the Alps (Comet
C/1999 H1 Lee, C/1999 J3 Linear, Pleaides...)
-
Results
from 9 nights in the Alps from 3rd to 12th September 1999
(Comet C/1999H1 Lee, Moon rise, ashen light, etc...)
- Leonid meteors trapped November 17th 1998, at
Saint-Michel-l'Observatoire, near OHP, between 3h50TU and 5h10TU
(Olympus OM1N + Zuiko 50mm f/1.8 + Kodak Gold
400ISO)
A bright one near Orion (image1),
a short, bright and colorfull Leonid (image2),
another one (image3
).
- Comet Hale-Bopp (March 1997)
Drawings
of
the comet at OHP 80cm telescope (dessins de
la comète observée au T80 de l'OHP), done at OHP
- Comet 1990c Levy from the Rossberg (Vosges), Newtonian
diameter
205mm f/5.5 primary focus images (August 1990)
My
homemade telescope: a 205mm
diameter f/5.5 fork-mounted
equatorial
Newtonian, PV-powered. The telescope
tracks
the stars with the solar energy accumulated during the day... A 53
Watts
MQ36D module from A.S.E. is now used, filling a standard12V 30Ah DC
car battery. In 1990, a smaller 11 Watts BPX 47-101-A from
Photowatt solar
panel was used, but its power was a little weak to fill the car battery
in one day.
Solar
cells are
very efficient to provide energy for my telescope! Other pictures are here and
here.
Solar
energy is a quiet energy! a good point when you want (or
try)
to sleep after a night of observation !
Le
télescope
fonctionne avec une batterie de 12V, rechargée pendant la
journée
avec un panneau solaire. Un limiteur de charge empêche la
batterie
de bouillir. Le panneau est un 53W A.S.E. MQ36D, couplé
à
une batterie de voiture de 12V. En 1990, j'utilisais un petit panneau PhotoWatt
de 11W (BPX 47-101-A), qui etait un peu faible pour recharger la
batterie
correctement. L'énergie solaire est
silencieuse! un
bon point quand on veut dormir après une nuit d'observation!
Jean-Pierre
Brahic, thank you for this picture!
-
An example of polymer
decoration: this polyethylene
crystal is covered by an epitaxial growth of small cristals from
polyethylene
vapour (molecules close to paraffin C18). The
short
paraffin molecules are oriented by the polyethylene 'loops' on crystal
surface, showing the crystal 'four-quadrant' structure. I obtained this
picture
(as well as the cristal itself!) in april 1990 at the Institut
Charles Sadron,
Strasbourg, during a practical course on polymer, crystal and
transmission electron microscopy with the group of Bernard Lotz. It has
nothing to do with
astronomy... but it's beautiful and very exciting science too !
Return to my
homepage
Last update January 5th
2006
Mercury
transit (7 May 2003)
An example of polymer
decoration: this polyethylene
crystal is covered by an epitaxial growth of small cristals from
polyethylene
vapour (molecules close to paraffin C18). The
short
paraffin molecules are oriented by the polyethylene 'loops' on crystal
surface, showing the crystal 'four-quadrant' structure. I obtained this
picture
(as well as the cristal itself!) in april 1990 at the Institut
Charles Sadron,
Strasbourg, during a practical course on polymer, crystal and
transmission electron microscopy with the group of Bernard Lotz. It has
nothing to do with
astronomy... but it's beautiful and very exciting science too !
