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.

Meteorites - Museum fur Naturkunde Berlin

If you enjoy seeing meteorites, ensure you visit the Museum fur Naturkunde in Berlin which has a collection of more than 5000 meteorites -only a dozen are displayed. But for each category you will find a meteorite sample.

On top of these samples you are able to see at the end of the main entrance a comprehensive collection of impact crater rocks which are among the largets in the world. It focusses on European, Asian and African impact craters. Interesting to see this exposition which was rather new for me.