So now, why a red morning. Ah... this is because in the morning/evening, when the sun is low at the sky, light travels much longer then during the day through the atmosphere. The distacnce can be as even 12x longer then during daytime. So the chance that blue light is fully scattered is very likely and only the red light is available to reach our eyes (so no blue light is left :) )
Pascal Hilkens Astro Home Page
Wednesday, December 21, 2016
Why a Red Sky in the Morning?
So now, why a red morning. Ah... this is because in the morning/evening, when the sun is low at the sky, light travels much longer then during the day through the atmosphere. The distacnce can be as even 12x longer then during daytime. So the chance that blue light is fully scattered is very likely and only the red light is available to reach our eyes (so no blue light is left :) )
Start Winter @ 11h44
Winter will start officially today @11h44. At that moment the sun will be directly overhead at the Tropic of Capricorn also known as the Southern Tropic.
Saturday, December 17, 2016
Collage of moonphases december 2016
This work took me about 779 minutes of which 504 minutes spread over 10days to make 133 pictures (a total of 1.16 Gb), and afterwards about 275 minutes making the final editing and establishing a collage using CS4.
Wednesday, December 14, 2016
Full Supermoon but not 100% full !
It's full moon today and this morning there are no clouds. So perfect time to make some pictures. It's also the third time this year (Oct, Nov) we can observe a supermoon. Also special today is that the moon is not exactly 100% full. This because the moon is not exactly in front of the sun. You can see this at the picture as some craters are still visible.
Monday, December 12, 2016
One day before full moon
With 98% illumination, the moon is almost 24h away from being "full". Below picture was taken with ISO100 and 1/160s shutterspeed.
Moon - 94%
The entire day was covered with clouds but luckely just before midnight this changed. For half a hour clouds pulled away with almost a clear sky. The moon is illuminated for 94% and thus much brighter then a couple of days ago. I changed settings from ISO200 to ISO100 and kept shutterspeed the same. As the moon is now "bigger" and not fitting into the sensor image, the picture is a composition of two photo's. This was done using CS4.
Friday, December 9, 2016
Moon 76% - Details up to 6km
Currently the moon is illuminated for 76%.
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