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Raro e particolare antico planetario della prima metà dell’800 realizzato da Charles Dien. Su una base di legno tornita ed ebanizzata è montato un sistema composto da due cerchi in ottone con le indicazioni dei solstizi e degli equinozi e da un cerchio orizzontale in peltro che reca incisi i mesi dell’anno e i segni zodiacali; all’interno di questi cerchi si trova la riproduzione della Terra e dalla Luna (in legno) che possono ruotare tramite un sistema di ingranaggi attorno al Sole, raffigurato da una sfera in ottone; al Sole è anche collegato un piccolo braccio alla cui estremità è fissato un disco in ottone che rappresenta il pianeta Venere, come si può leggere dall’incisione “Venus” sul disco stesso.
Come si può notare, non si tratta della consueta rappresentazione del sistema solare, ma sono rappresentati, oltre a Giove, Nettuno, Saturno e Urano, alcuni pianetini, Vesta, Giunone e Cerere, scoperti nei primi dell’800, quasi a voler “fotografare” con questo strumento le scoperte astronomiche più recenti dell’epoca. Manca ovviamente Plutone scoperto solo nel 1930, e Mercurio, molto probabilmente perché è difficilmente osservabile dalla Terra, cioè solo quando la sua distanza angolare dal Sole è massima e quindi forse all’epoca sfuggivano ancora a una comprensione precisa tutte le sue caratteristiche e i suoi movimenti intorno al Sole.
Rare and particular antique orrery, first half of ‘800, realized by Charles Dien. On a turned and ebonized wooden base there is a system including two brass circles with indications of solstices and equinoxes, and a pewter horizontal circle with monthes of year and signes of the zodiac; inside this system there is a representation of the Earth and the Moon (wood) that can be rotate by cog-wheeles around the Sun represented by a brass sphere; it is connected to the Sun a small arm with at the end a brass disk representing the Venus planet, as it says the inscription on it.
It is not the usual representation of the solar system: there are Jupiter, Neptune, Saturn, Uranus and other small planets, Vesta, Juno and Ceres, discovered at the beginning of ‘800, so this planetarium is a “photograph” of astromic discoveries of that period. Obviously there is not Pluto, discovered just in 1930, and Mercury, perhaps because of difficulties to observe this planet and to understand all its characteristics.
Taken with a Celestron 11 inch Schmidt Cassegrain telescope using a DMK 21AU04.AS Imaging Source mono chrome camera and separate LRGB filters. Much better than previous attempt. Seems my collimation is not off as I thought initially. In total the AVIs have 3500 frames for Luminance and approx 900 frames for Red, Blue and Green each for a total of almost 6500 frames. Luminance taken at 60Fps, all color channels at 30Fps. Processing went through Virtual Dub, Ninox, Registax, AstraImage and finally Photoshop.
The detail of clouds in the North Equatorial is nice. Also the white dots on the Southern region and how nicely both the GRS and Red Spot Junior came out.
Seeing was better than average for South Florida, mostly low humidity and still air.
Well I finally got the new (new to me) Celestron 9.25 collimated and tuned (mostly). Mars is quickly falling into the distance, but I was surprised at the sharpness of the images the C9.25 produced under good seeing (3.5 of 5).
However, the night earlier, under worse seeing conditions (3 of 5), my Meade 8" out performed it. This shouldn't have been a surprise to me since it's pretty well agreed that larger aperture scopes suffer the effects of bad seeing more than smaller scopes, but given good seeing conditions, the resolving power of of the larger scope will result in sharper views.
This leaves me a bit split-minded about upgrading to the C9.25 given I live in MN (45 parallel) where the seeing conditions are typically not the best . I got a good scope at a fair price so I know if I decide to stick with the 8", I can probably sell the C9.25 w/o losing too much more. But deciding to go with a less capable scope is a tough decision to make. Right now I'm leaning at keeping the 9.25, but honestly mostly because my new Skywatcher 80APO looks a bit cookoo mounted on the 8" (I know thats a ridiculous thing to base my decision on!)
If anyone has any thoughts to throw into the ring, let me know. I could use some advice.
(Shot thru Celestron 9.25 SCT)
Additional Equipment Used: Click Here
Taken back in June 2012 this is my best so far I've been able to image Saturn. Im improving but still it's along way to go. Imaged with cpc925, 60d at prime, video 49" post in registax and LR.
Viet (Jon) Nguyen of National Aeronautics and Space Administration - NASA presents Eyes on the Solar System - solarsystem.nasa.gov/eyes/
copyright © 2011 sean dreilinger
view Viet (Jon) Nguyen of NASA presents Eyes on the Solar System - _MG_3898 on a black background.
I was trying to photograph Saturn, but grabbed tiny-tiny Mimas by accident, as it was illuminated by Saturn's bright rings.
Zagora 006 (Morocco) — eucrite (HED), brecciated — polished slice (6 g).
Macro views show a fine-grained light-grey matrix with darker clasts and scattered opaque grains. Localized orange-brown staining likely from terrestrial weathering/oxidation.
Credit : Thomas Thomopoulos
My first solar image, showing Sun Spots AR2644 (upper right) and AR2645 (lower left). Taken using a QHY8L CCD attached to the Altair Wave 115ED refractor with an AstroZap solar filter fitted. It is the result of 100 single exposures, stacked in AutoStakkert 2, sharpened in RegiStax 6 and processed in Photoshop CS6.
bean - mercury
grape - venus
cherry - earth
pea - mars
mango - jupiter (supposed to be a grapefruit)
orange - saturn
peach - uranus
plum - neptune
hula hoop - sun
Taken at 0822-0825 UTC on Oct 24 2010. Imaged with Imaging Source DMK41AF02 camera and 2x barlow attached to an Orion XT10 newtonian scope on a NEQ6 Pro mount.
This is an LRGB image stacked using AutoStakkert with standard deconvolution settings, LRGB combined in AstraImage Pro.
South is UP in this image!
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Five images made with a C8 and Imaging Source video camera. Stacking and processing with RegiStax, aligned with Photoshop
Of course we visited Skansen, an open air museum in the east of stockholm. Near the observatory they placed small rocks and balls representing the Solar System.
Five frame mosaic made with an 8" F/6 Newtonian and Imaging Source video camera. Video processed with RegiStax, aligned with Photoshop.
bean - mercury
grape - venus
cherry - earth
pea - mars
mango - jupiter (supposed to be a grapefruit)
orange - saturn
peach - uranus
plum - neptune
hula hoop - sun
Test shot with a William Optics 110mm F/5.95 refractor at prime focus. Canon XSi, 1/500 sec. This is an ED doublet, color control is excellent.
I finally managed to catch Mars with my DMK41AF02 camera last night, albeit quite low above the horizon (~20-25 degrees). Unfortunately the low declination meant poor seeing conditions and, even with only a 2x barlow attached, I really struggled to find a good focus point. I would’ve liked to try imaging it with a 5x Powermate, but that would’ve been pointless, so, as a result, the image is quite small.
As I began capturing the blue channel, Mars was being filtered through the leaves of a pesky tree on our property, and you can see that the blue channel image is very distorted and doesn’t contain much detail. I would have had to wait until about 3:30am to get a clear shot at it again (and it would have been at a better point for imaging too), but chose bed instead!
South is UP in this image :-)