This moon mosaic was made during the national star observation days. It was made using a C11 at f/10. 107 images were made using a DMK21-618. The images were stacked (Autostakkert V2) from 30s movies (1800 frames) of which the best 25% was used for stacking. Post-processing was done using astra-image and mosaicing using Imerge. …
This is a mosaic of the moon made on 01-02-2012. It’s the sharpest image of the moon I made until now. It consists of 48 images made with my C11 at f/10 and a DMK21-618 webcam. Separate images consist of movies of 1800 images each, of which 80% is used.
The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from …
NGC 7380 is an open cluster discovered by Caroline Herschel in 1787. William Herschel included his sister’s discovery in his catalog, and labelled it H VIII.77. It is also known as 142 in the 1959 Sharpless catalog (Sh2-142). Known as the Wizard Nebula, this object is a reasonably large nebula located in Cepheus. Skywatcher ED80/Robtics …
The Elephant’s Trunk nebula is a concentration of interstellar gas and dust in the star cluster IC 1396 – an ionized gas region located in the constellation Cepheus about 2,400 light years away from Earth. The piece of the nebula shown here is the dark, dense globule IC 1396A; it is commonly called the Elephant’s …
Qatar-1b is a gas-giant planet, 1.1 times more massive than Jupiter and with a diameter 1.2 times that of Jupiter. It orbits an orange dwarf star (named Qatar-1 in honour of the discovery, catalogue number 3UC311-087990) which is located 170 parsecs (550 light-years) from Earth in the northern constellation of Draco. At this distance, the …
Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They are caused by intense magnetic activity, which inhibits convection by an effect comparable to the eddy current brake, forming areas of reduced surface temperature. Like magnets, they also have two poles. Although they are …
The Pelican Nebula (also known as IC5070 and IC5067) is an H II region associated with the North America Nebula in the constellation Cygnus. The nebula resembles a pelican in shape, hence the name. The Pelican Nebula is a large area of emission nebula in the constellation Cygnus (the Swan), close to Deneb, and divided …
This is a comparison of an image made by the 1,0m telescope on the Pic-du-Midi in the Pyrenees and my C11 image made from HI-Ambacht, in my backyard. Between the two images there is a 10-day gap, but the view is almost exactly the same because of the rotational period of Jupiter.
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the “Red Planet”, as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface …