Double Rainbow

 

A double rainbow above the Demer River in Langdorp (Aarschot)

Mars with Open star cluster M35

 

This week Mars is near open star cluster M35. On April 25, 2021 I could observe and image this same situation - see this link.

Setting : Nikon D7500, f/5.6, 200mm, ISO10.000 exposure 2s. Editing using CS4, single shot.

Venus and Jupiter

 

Venus and Jupiter (low above the horizon) after sunset on March 27th. 

Jupiter - Mercury

 

Jupiter - Mercury "close encounter", about 3,5° above the horizon.

Setting: Nikon D7500 - lens 18-200 f/5.6 ISO400 1/15s

Editing using CS4

Reworking M81 and Needle Galaxy using Refine Edges and Lab Color

I reworked my images of Galaxy M81 (Bode's Galaxy) and the Needle Galaxy (NGC4565). Starting from my APP stacked image (Tiff) I used color range (NL kleurbereik) and Refine Edges (NL Hoeken verfijnen) to select the galaxy. Next I changed the brightness, contracts and colors. The finalize I changed from RGB to Lab Color and change brightness again using "bringhtness Channel". Before saving I RGB was selected again. Noise was reduced using DeNoise AI.

ATT Essen Program Available

On May 13, the biggest European astronomy fair ATT (Astronomie und Techniktreff) will take place in Essen (Germany). Today the organisation presented the program - see this link

Beside the many exibitors and meeting astronomy friends, I'm looking out to the lecture of Ulrich von Kusserow.

See also lectures by Ulrich von Kusserow in 2018 and 2019 

Formation of the magnetic solar system (Ulrich von Kusserow)

In this lecture, the variety of possible influencing factors of cosmic magnetic fields on the formation and early development of our solar system and other sun-like star systems is explained as clearly as possible using colorful illustrations, animations and video sequences. After a short introduction, the central events in the course of the history of knowledge acquisition on this topic will be presented in more detail. The following section deals with the great current importance of magnetic processes in the interior and atmosphere of the sun, in the surrounding heliosphere shaped by the magnetic solar wind, and the fascinating processes in the magnetospheres of the planets and moons, asteroids and comets in our solar system .

The fourth section explains how so-called accretion disks form around such stars, in which magnetic turbulence and, in particular, magnetized winds emanating from these disks ensure the effective removal of angular momentum and thus the transport of matter to increase the stellar mass and the formation of the planets. In the last section, the possible magnetic influence on the increasing compression and migration of dust particles, rock-like objects and planetesimals and finally on the formation of the magnetic planets in our solar system is considered.

50 days to ATT Essen

 

The next ATT (biggest Astronomy fair in Europe) is scheduled on May 13, 2023 and will be organised in Essen (Germany).