A Ring around the Moon

An incoming layer of high cirrus clouds announces a change in the high-pressure weather pattern. The ice crystals in the clouds create a highly visible 22° ring of light, also known as a halo around the first-quarter moon.

Lens: Tokina AT-X 12-24 f/f
Camera: Nikon D200
Exposure: f/4 15s ISO 200
Date: 12th February 2011

 

NGC 4565

Move your mouse over the image to see annotations for some galaxies.

A larger version of this image which has been annotated with AVM headers can be opened in Microsoft WWT:ngc4565_150mm.jpg

Telescope:
150mm f/5 Newtonian, Baader MPCC Coma Corrector
Camera
Nikon D200
Exposure:
4x300s, ISO 800
Date:
18th, April 2009
Processing:
Preprocessing (Dark, Flat & Bias correction), Alignment & stacking in IRIS, histogram adjustment curves, color correction in Photoshop.

From Clavius to Schiller

This is a two-frame mosaic taken with a DMK21 camera and an Astro-Professional 80mm ED refractor:


The very obvious crater in the middle of the mosaic is Tycho, it is relatively young and therefore the ejecta rays can still be seen brightly across the lunar landscape. Please note the dark area directly around Tycho which is also caused by ejecta of the impact.
To the lower right is the beautiful crater Clavius which has a nice curve of smaller craters on the floor. To the lower left you can see the very elongated crater Schiller which was produced by an oblique impact. Read More

Gassendi, Clavius & Schiller

After showing Venus, M45, M42, Saturn and the moon to my in-laws I stayed on the roof for a little longer and took some AVIs using our club’s new DMK camera. I used my 150mm f/5 Newtonian telescope with a 2x barlow and a 90° prism (this gives about 2,7x). Again I had big troubles focusing because of my wobbly Super-Polaris mount.

Crater Gassendi and Mare Humorum:

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