Observing the sun on July 5th 2015

On July 5th, 2015, the Flanders region will organize activities to observing the sun.
See also http://www.vvs.be/subsite/zonnekijkdag/ontdek-onze-zon-op-5-juli-2015
I will keep you informed.

Moon 92%

Two days after full moon...

Meteorites under microscope

Helios Astronomy club was invited by one of it's members Lieven - thanks for the nice invitation. On the agenda today, observing meteorites under the microscope. Jan brought along his meteorites collection  - a mars meterorite, a iron meteorite and a rock sample impacted by a meteorite.

The Science behind gravitational lensing by spinning black holes

Astrophysics of the accretion disk shown around spinning black holes is explained in this movie  Gravitational lensing by spinning black holes - see also http:\\www.orionxt12.blogspot.com

Avg and extremes for April 2015

Weather results for April 2015 - Averbode. April counted 25 days without rain (17mm). 

Light Grafitti

Settings for taking astronomical pictures at typically require long exposures, large aperture and high ISO. When setting your camera to a small aperture, still using long exposure time and high ISO you are able to take some nice light grafitti pictures - See http:\\www.orionxt12.blogspot.com

Light Grafitti -  Car lights in Berlin

Natürkunde Pictures - Bleu Jellyfish

Playing and experimenting with my digital camera sometimes results in beautiful pictures. See http:\\www.orionxt12.blogspot.com

Picture taken from Bleu Jellyfish in the Zoo Aquarium Berlin.